Answer:
3A
4C
5B
6C
7A
8A
Step-by-step explanation:
If I'm wrong
Which of the following statements regarding the transmission of pathogens from environmental surfaces are true?
a. Pathogens can be spread by contact with contaminated surfaces.
b. Placing a resident in a room previously occupied by a C. diff positive resident increases the risk for acquiring C. diff. c. You must touch a surface for at least 3 minutes for pathogenic transfer to occur. d. Most pathogens can only survive on surfaces for a few minutes
TRUE statements regarding the transmission of pathogens via environmental surfaces are the statements in option A and B.
What are Pathogens?Pathogens can be referred to as microscopic organisms which can cause diseases and illness. They are bacteria, fungi, virus or other disease causing organisms.
These pathogens can be transmitted via environmental surfaces especially by coming in contact with contaminated surfaces. Some pathogens survive longer on surfaces, while some only survive for few minutes.
If someone is placed in a room previously occupied by an infected person, the chances of contacting that same disease is high.
Thus, the statements that are TRUE regarding the transmission of pathogens via environmental surfaces are the statements in option A and B.
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A model of a car is made to scale of 1:10. What is the ratio of the volumes of the model car to the real car? If the model car has a mass of 2.1kg,what is the mass of the real car (assuming the same metal is used
Answer:
The answer to your problem is:
1:1000 ( Ratio )
2,100 kg ( Weight )
Step-by-step explanation:
The scale of 1:10 means a volume scale of 1:1000.
The ratio of the volumes is model:real = 1:1000.
Mass can be the proportional to the volume.
The real car has a volume 1000 times the volume of the model, so its mass is also 1000 times the mass of the car. Which then we need to multiply
= 1000 × 2.1 kg = 2100 kg
Thus the answer is:
1:1000 ( Ratio )
2,100 kg ( Weight )
help me human..... :(
Answer:
D
Step-by-step explanation:
I need solution with every steps definition! please don't copy the
answer else I will dislike!!
Solution: Your solution here. PROBLEM 4 (Proofs by contradiction). Prove by contradiction that if \( a^{2} \) is even then \( a \) is even.
Assumption that \( a \) is not even (odd) must be incorrect.Therefore, we can conclude that if \( a^2 \) is even, then \( a \) must be even.This completes the proof by contradiction.
To prove by contradiction that if \( a^2 \) is even, then \( a \) is even, we assume the opposite, i.e., that \( a \) is not even.
Assumption: \( a \) is not even (odd).
Since \( a \) is odd, we can write it as \( a = 2k + 1 \), where \( k \) is an integer.
Now, let's square both sides:
\( a^2 = (2k + 1)^2 = 4k^2 + 4k + 1 = 2(2k^2 + 2k) + 1 \)
We can see that \( a^2 \) can be expressed in the form \( 2m + 1 \), where \( m = 2k^2 + 2k \), which means \( a^2 \) is odd.
However, this contradicts our initial assumption that \( a^2 \) is even.
Hence, our assumption that \( a \) is not even (odd) must be incorrect.
Therefore, we can conclude that if \( a^2 \) is even, then \( a \) must be even.
This completes the proof by contradiction.
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six less than the product of a number n and 1/7 is no more than 95
ANSWER:
\(\frac{1}{7}n-6\le95\)STEP-BY-STEP EXPLANATION:
We must interpret each sentence mathematically, just like this:
Less then would be a subtract
Product would be a multiplication
No more than would be equal or less than
\(\frac{1}{7}n-6\le95\)Which postulate proves these two triangles are congruent? A. ASA C. HL B. None, not congruent D. SSA
Answer:
A
Step-by-step explanation:
They have the same side, one side is congruent to itself.
alternate interor angle are the same, which is:
Top left of the triangle on the left + botton right of the triangle on the right,
and top left on the triangle on the right + botton right of of the triangle on the left.
7. Calculate Rock A contains
10% quartz and 45% calcite.
The rest of the rock is mica.
What percentage of the rock
is mica?
Answer:
45% of the rock is mica
Step-by-step
10% + 45% = 55%. 100% - 55% = 45%
a
Write and evaluate the expression. Then, check all that
apply
the difference of a number and ninety;
o Write the expression as
90
when a = 102
Subtraction Words
Write the expression as 90-a.
Write the expression as a -90,
O Substitute 102 in for the variable, a.
Simplify by subtracting 90 from 102.
Simplify by dividing 102 by 90.
decreased by
difference
fewer
The answer is 1.13.
less than
The answer is 12.
subtract
Answer: Write the expression as a -90,
O Substitute 102 in for the variable, a.
Simplify by subtracting 90 from 102.
Step-by-step explanation:
The answer is 12.
subtract
The value of the expression at a = 102 is, 12.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Let the unknown number = a
The expression is written as;
⇒ a - 90
Now, We can substitute a = 102 in above equation, we get;
⇒ a - 90
⇒ 102 - 90
⇒ 12
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Need help
Having a hard time with this question
and gets 70 points for this
Step-by-step explanation:
According to the Alternate Exterior Angles Theorem, when a transversal cuts two parallel lines, the alternate exterior angles are congruent.
In this scenario, angle ZCXP is an alternate exterior angle with respect to angles ZRYD and ZSYD. Since angle ZRYD is congruent to angle ZSYD, angle ZCXP is also congruent to angle ZRYD.
Therefore, the correct answer is A. ZRYD.
without expanding any brackets
show how to work out the exact solutions of 25(2x+3)^2 = 16
(give the solutions)
Answer:
(2x+3)^2 = 16/25
(2x+3) = √(16/25)
2x+3 = 4/5
2x = 4/5 - 3
x = -1 .1
Somebody help me out please
Answer:
So need me to solve it?
Step-by-step explanation:
the density of a certain material is such that it weighs 3 grams per fluid ounce of volume. express this density in ounces per liter. round your answer to the nearest hundredth.
The density in ounces per liter is 3.57826 rounding off = 3.58
Density of a substance can be defined as a relationship between the mass and the volume of that substance.
\(Density=\frac{Mass}{Volume}\)
For Example if a metal have a mass 0f 7gm and volume as \(5cm^{3}\)
\(Density=\frac{7}{5} = 1.4g/cm^{3}\)
we know that 1 gram/fluid ounce of volume = 1.19275 ounces/liter
1 gm/fluid ounce =1.19275 ounces/liter
3 gm/fluid ounce = 3*1.19275 ounces/liter
So 3 gm/fluid ounce = 3.57826 ounces/liter
On rounding it to nearest hundredth we get 3.58 ounces/liter
Therefore the density of the material which weighs 3 gm/fluid ounce in ounces/liter is 3.58.
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Use the method of Undetermined Coefficients to find the general solution to the DE y" - 3y' + 2y = e^x + e^2x + e^-x.
the general solution to the given differential equation is:
y = C₁\(e^t\)+ C₂\(e^{(2t)} + (1/4)e^x + (3/8)e^{(2x)} + (3/8)e^{(-x)\)
What is Equation?
In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For example, 3x + 5 = 14 is an equation in which 3x + 5 and 14 are two expressions separated by an "equals" sign.
To find the general solution to the differential equation y" - 3y' + 2y =\(e^x + e^{(2x)} + e^{(-x)\) using the method of undetermined coefficients, we'll first find the complementary solution, and then the particular solution.
Step 1: Complementary Solution
We start by finding the complementary solution to the homogeneous equation y" - 3y' + 2y = 0.
The characteristic equation is obtained by substituting y = e^(rt) into the homogeneous equation:
\(r^2 - 3r + 2 = 0\)
Factoring the quadratic equation, we have:
(r - 1)(r - 2) = 0
This gives us two roots: r₁ = 1 and r₂ = 2.
Therefore, the complementary solution is:
y_c = \(C_1e^{(r_1t)} + C_2e^{(r_2t)\)
= C₁\(e^t\)\(e^t\) + \(C_2e^{(2t)\)
Step 2: Particular Solution
To find the particular solution, we assume that the particular solution has the form:
y_p = \(A_1e^x + A_2e^{(2x)} + A_3e^{(-x)\)
where A₁, A₂, and A₃ are undetermined coefficients.
We differentiate y_p to find the derivatives:
y_p' =\(A_1e^x + 2A_2e^{(2x)} - A_3e^{(-x)\)
y_p" = \(A_1e^x + 4A_2e^{(2x) + A_3e^{(-x)\)
Substituting y_p, y_p', and y_p" into the original differential equation, we get:
\((A_1e^x + 4A_2e^{(2x)} + A_3e^{(-x)}) - 3(A_1e^x + 2A_2e^{(2x)} - A_3e^{(-x)}) + 2(A_1e^x + A_2e^{(2x}) +A_3e^{(-x)}) = e^x + e^{(2x)} + e^{(-x)\)
Simplifying, we have:
\(A_1e^x + 4A_2e^{(2x)} + A_3e^{(-x)} - 3_1e^x - 6A_2e^{(2x)} + 3A_3e^{(-x)} + 2_1e^x + 2A_2e^{(2x)} + 2 A_3e^{(-x)} = e^x + e^{(2x)} + e^{(-x)\)
Grouping like terms, we obtain:
(4A₂ - 2A₁)\(e^{(2x)} + (A_1 + A_3)e^x + (3 A_3 - 2A_1)e^{(-x)} = e^x + e^{(2x)} + e^{(-x)\)
To solve for the coefficients, we equate the coefficients of like terms on both sides of the equation:
4A₂ - 2A₁ = 1 (coefficient of \(e^{(2x)})\)
A₁ + A₃ = 1 (coefficient of \(e^x\))
3A₃ - 2A₁ = 1 (coefficient of \(e^{(-x)\))
Solving this system of equations, we find:
A₁ = 1/4
A₂ = 3/8
A₃ = 3/8
Step 3: General Solution
Now that we have the complementary solution and the particular solution, we can write the general solution as:
y = y_c + y_p
= C₁\(e^t\) + \(C_2e^{(2t)} + A_1e^x + A_2e^{(2x)} + A_3e^{(-x)\)
= C₁\(e^t\) +\(C_2e^(2t) + (1/4)e^x + (3/8)e^{(2x)} + (3/8)e^{(-x)\)
where C₁ and C₂ are arbitrary constants.
Therefore, the general solution to the given differential equation is:
y = C₁\(e^t\) + C₂\(e^{(2t)\) +\((1/4)e^x + (3/8)e^{(2x)} + (3/8)e^{(-x)\)
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The number of people call 911 on March 25th?
A) continuous
B) discrete
C) categorical
Answer:
I think the answer is continuous hope this helps
Step-by-step explanation:
Also got subscribe to my YT channel BlxeVxbes
Plz help due tomorrow
what is the smallest integer value of $c$ such that the function $f(x)=\frac{2x^2+x+5}{x^2+4x+c}$ has a domain of all real numbers?
The smallest integer value of c that ensures the function f(x) has a domain of all real numbers is c = 5.
For the function f(x) to have a domain of all real numbers, the denominator x^2 + 4x + c cannot be equal to zero. If the denominator equals zero, the function would have undefined values.
To find the smallest integer value of c that satisfies this condition, we need to find the values of c that make the quadratic x^2 + 4x + c = 0 have no real solutions.
For a quadratic equation ax^2 + bx + c = 0 to have no real solutions, the discriminant (b^2 - 4ac) must be negative.
In this case, we have a = 1, b = 4, and c is the variable we are trying to determine.
The discriminant is:
b^2 - 4ac = 4^2 - 4(1)(c) = 16 - 4c
To have no real solutions, the discriminant must be negative:
16 - 4c < 0
Solving this inequality, we find:
4c > 16
c > 4
Since c must be an integer, the smallest integer value of c that satisfies this condition is 5.
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Is square root of 4 a polynomial?
Square root of 4 is not a polynomial. It is a quadratic function. Functions containing other operations like square root is not a polynomial.
A polynomial need not have any square root. polynomial is a finite sequence form. it must contain no square roots of variables, no fractional or negative powers on the variables, and no variables in the denominators of any fractions. Polynomial are sums and differences of polynomial terms. For an expression to be a polynomial term, any variables in the expression must have whole number powers. It should not have any square root, cube root or any negative values. Quadratic function can have square root cube roots and fraction values.
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Rachel has a bowl shaped like a hemisphere. Which of the following statements about the bowl are accurate?
The statements about the bowl that are accurate include:
A. The area of the opening of the bowl is 63.6 square inches.
E. The volume of the bowl, rounded to the nearest tenth is 575.2 cubic inches.
How to calculate the volume of a hemisphere?In Mathematics and Geometry, the volume of a hemisphere can be calculated by using the following mathematical equation (formula):
Volume of a hemisphere = 2/3 × πr³
Where:
r represents the radius.
By substituting the given parameters into the formula for the volume of a hemisphere, we have the following;
Volume of a bowl = 2/3 × 3.142 × (6.5)³
Volume of a bowl = 575.2 in³
Area of circle = π × (radius)²
Area of bowl = 3.142 × (6.5)²
Area of bowl = 132.7 in².
Volume of a bowl = 575.2/3 = 191.7 in³
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
When can parallelism make your algorithms run faster when could it make your algorithms run slower?
When an algorithm necessitates extensive sharing of instantaneous results, parallelism slows it down. Because there are multiple independent parallel processes and the right number of threads, parallelism will speed up an algorithm.
What algorithm is parallelizable?The ones with data dependencies are the most challenging. It will be exceedingly challenging, for instance, if you are dealing with a vector and the input for the computation at point n depends on the output at position n-1.
When this occurs, you must comprehend what the original algorithm is doing and take an alternative approach. For the aforementioned case, it might be a difficulty with digital signal processing including a feedback-containing digital filter. These are challenging to parallelize, but that is not the sole solution. Instead, you might use the filter and signal's fast Fourier transforms, multiply them, and then perform the inverse transform. All of these operations can be partially parallelized.
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$200 for 12 piano lessons
Answer: Is the question to find unit price, if it is, the answer is $16.77. Divide 200/12 to get the unit price. Hope this helps and good luck to having a bright future ☀️
Step-by-step explanation:
please help this is due tmrw!
Answer:
3 games per year
Step-by-step explanation:
rate of change is (Y1-Y2)/(X1-X2)
X1: 2012
Y1: 12
X2: 2014
Y2: 18
So: (12-18)/(2012-2014)=(-6)/(-2)=3
there are 9 different positions on a baseball team. if a team has 17 players, how many different line-ups can the team make? (assume every player can play every position.)
Therefore, there are 24,387,120 different line-ups permutation that can be made with 17 players for 9 positions.
The number of different line-ups that can be made with 17 players for 9 positions can be calculated using the permutation formula:
P(17, 9) = 17! / (17 - 9)!
where "!" represents the factorial function.
P(17, 9) = 17! / 8!
= (17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 x 9) / (1 x 2 x 3 x 4 x 5 x 6 x 7 x 8)
= 24,387,120
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Jennifer makes bracelets and sells them for 6$ each . Each week, she spends $22 on the material needed to make the bracelet. Which of the following inequalities models the number of bracelets,b, Jennifer can sell each week and make profit?
Answer:
theres no answers to choose from
Tre knows that he can mow 3 lawns in two hours. Tre starts mowing on Monday and wants to complete his 20 lawns before Friday. If he wants to work an equal amount each day, how many hours will he have to work each day to mow all 20 lawns? Explain your process.
Answer: Tre wants to mow 20 lawns in 5 days, so he needs to mow 20/5=<<20/5=4>>4 lawns per day.
If Tre can mow 3 lawns in 2 hours, then he can mow 1 lawn in 2/3=<<2/3=0.67>>0.67 hours.
This means Tre will have to work 4/0.67=<<4/0.67=6>>6 hours each day to mow all 20 lawns. Answer: \boxed{6}.
Step-by-step explanation:
kevin opened a savings account with texas national bank. his account has an apr of 1.75% compounded quarterly. if kevin opens his account with $2500, how long will it take for the account to earn $7500?
It will take 62.91 years for Kevin to make the amount $2500 to $7500 .
In the question ,
it is given that ,
the amount that Kevin deposited (P) in bank = $2500
the interest rate (r) = 1.75% ,
the compound interest is quarterly ,
So , n is = 4 .
let the time taken to earn $7500 be = x years ;
Substituting the values in the Amount formula for the Compound Interest ,
Amount = P(1 + r/n)ⁿˣ
7500 = 2500(1 + 0.0175/4\()^{4x}\)
Simplifying further ,
we get ,
3 = (1.004375\()^{4x}\)
After applying log both the sides ,
we get ,
log(3) = 4x*log(1.004375)
x = log(3)/(4*log(1.004375))
Simplifying further ,
we have ,
x = 62.91 years .
Therefore , the time taken is = 62.91 years
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For the numbers p = 11, 8 = 4, a = 7, and b = 8, perform the following computation by hand. Show your computation. a. Compute A = gå mod p and k= A mod p. b. Compute B = g mod p and k = B mod p. Consider using Fermat's theorem, and the property of modular multiplication. E.g., 46 = 212 = 210.22 = 22 = 4 (mod 11). Note that 210 = 1 mod 11 by applying Fermat's theorem for p=11. = =
In summary:
a) A = 3, k = 3
b) B = 9, k = 9
To perform the given computations, we will use modular arithmetic and Fermat's theorem.
a) Compute A = g^a mod p and k = A mod p:
Given values:
p = 11
g = 8
a = 4
Step 1: Compute A = g^a mod p
A = 8^4 mod 11
Calculating the powers of 8 mod 11:
8^1 = 8 (mod 11)
8^2 = 9 (mod 11)
8^3 = 6 (mod 11)
8^4 = 3 (mod 11)
Therefore, A = 3.
Step 2: Compute k = A mod p
k = 3 mod 11
Therefore, k = 3.
b) Compute B = g^b mod p and k = B mod p:
Given values:
p = 11
g = 7
b = 8
Step 1: Compute B = g^b mod p
B = 7^8 mod 11
Calculating the powers of 7 mod 11:
7^1 = 7 (mod 11)
7^2 = 5 (mod 11)
7^3 = 2 (mod 11)
7^4 = 3 (mod 11) [Repeating pattern starts]
Since we have a repeating pattern, we can simplify the calculation:
7^8 = (7^4)^2 = (3)^2 = 9 (mod 11)
Therefore, B = 9.
Step 2: Compute k = B mod p
k = 9 mod 11
Therefore, k = 9.
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A forest fire which is initially 60 acres grows by 20% each day. firefighters battling the blaze can put out 15 acres of fire per day. what is the recursive rule for the number of an acres at the beginning of the nth day. how many acres are burning at the 8th day?
The recursive rule for the number of acres at the beginning of the nth day in a forest fire that grows by 20% each day and is battled by firefighters who can put out 15 acres per day is given by: A(n) = 1.2 * A(n-1) - 15, where A(n) represents the number of acres at the beginning of the nth day. Using this rule, we can calculate that there are 89.6 acres burning at the beginning of the 8th day.
Explanation: To determine the recursive rule for the number of acres at the beginning of the nth day, we need to consider the given information. The forest fire initially covers 60 acres and grows by 20% each day. This means that the number of acres at the beginning of the next day (n+1) is 1.2 times the number of acres at the beginning of the current day (n). However, the firefighters are able to put out 15 acres of fire per day.
Therefore, to calculate A(n), we start with the initial number of acres, which is 60, and apply the recursive rule. A(n) = 1.2 * A(n-1) - 15. This formula takes into account the growth of the fire by 20% and the reduction of 15 acres due to the firefighters' efforts. By substituting the values, we can calculate the number of acres at the beginning of each day.
To find the number of acres burning at the 8th day, we substitute n = 8 into the recursive rule. A(8) = 1.2 * A(7) - 15. We need to determine A(7) first by substituting n = 7, and so on, until we reach the initial value A(1) = 60. Once we have calculated A(8), we can determine that there are 89.6 acres burning at the beginning of the 8th day
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If (x 2y)dy/dx=2x-y what is the value of.
The second differential of the function is 3/7
Given the differential function \((x +2y)=\frac{dy}{dx} (2x-y)\)
Differentiate both sides with respect to x implicitly
\((x +2y)=\frac{dy}{dx} (2x-y)\)
\(1+2y'=y"(2x-y)+y'(2-y') \\y''=\frac{1+2y'}{(2x-y)+y'(2-y') }\)
Get the first derivative at the point (3, 0)
\(y'=\frac{2x-y}{x+2y} \\y'=\frac{2(3)-0}{0+2(3)}\\y'=\frac{6}{6} \\y'=1\)
Substitute into the second derivative to have:
\(y''=\frac{1+2y'}{(2x-y)+y'(2-y') }\\y''=\frac{1+2(1)}{(2(3)-0)+(1)(2-(1)) }\\y''=\frac{3}{6+1} \\y''=\frac{3}{7}\)
Hence the second differential of the function is 3/7
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Complete question:
If (x 2y)dy/dx=2x-y what is the value of \(\frac{d^2y}{dx^2}\) the point (3,0)
What round to the nearest hundredth if nessary so how i round 9mi to find the answer which the answer is km
Answer:
14.48 kilometers
Step-by-step explanation:
To convert miles to kilometers, multiply the length value by 1.609. 9 times 1.609 is 14.481. We need to round this to the nearest hundredth. Since the third decimal digit is 1, we round down. That gets us 14.48 as our answer.
How can you determine if a relation represented as a set of ordered pairs
is a function? Explain your reasoning.
Answer:
Hey there!
Using the vertical line test. In a function, one x value only has at most one y value.
Let me know if this helps :)