25 is the answer id ont know how to explain it
Researchers are monitoring two different radioactive substances. They have 300 grams of substance A which decays at a rate of 0.15%. They
have 500 grams of substance B which decays at a rate of 0.37%. They are trying to determine how many years it will be before the substances
have an equal mass.
If Mrepresents the mass of the substance and trepresents the elapsed time in years, then which of the following systems of equations can be
used to determine how long it will be before the substances have an equal mass?
Answer:
231.59 years
Step-by-step explanation:
To model this situation we are going to use the exponential decay function:
f(t)= a (1-b)^t
where f(t) is the final amount remaining after t years of decay
a is the final amount
b is the decay rate in decimal form
t is the time in years
For Substance A:
Since we have 300 grams of the substance, a=300. To convert the decay rate to decimal form, we are going to divide the rate by 100%:
r = 0.15/100 = 0.0015. Replacing the values in our function:
f(t) = a (1-b)^t
f(t) = 300 (1-0.0015)^t
f(t) = 300 (0.9985)^t equation (1)
For Substance B:
Since we have 500 grams of the substance, a= 500. To convert the decay rate to decimal form, we are going to divide the rate by 100%:
r=0.37/100= 0.0037. Replacing the values in our function:
f(t) = a (1-b)^t
f(t)= 500 (1-0.0037)^t
f(t)=500(0.9963)^t equation (2)
Since they are trying to determine how many years it will be before the substances have an equal mass M, we can replace f(t) with M in both equations:
M=300(0.9985)^t equation (1)
M=500(0.9963)^t equation (2)
We can conclude that the system of equations that can be used to determine how long it will be before the substances have an equal mass, M, is :
{M=300(0.9985)^t
{M=500(0.9963)^t
Given these data, what are the observed allele frequencies? Genotypes at the T102C locus TT TC CC 108 194 48
The observed allele frequencies for the T102C locus are as follows: T allele frequency = 0.388 and C allele frequency = 0.612.
To calculate the observed allele frequencies, we divide the number of occurrences of each allele by the total number of alleles observed.
In this case, the T allele is observed in 108 TT genotypes and 194 TC genotypes, giving a total of 108 + 194 = 302 T alleles. Similarly, the C allele is observed in 194 TC genotypes and 48 CC genotypes, giving a total of 194 + 48 = 242 C alleles.
To calculate the T allele frequency, we divide the number of T alleles by the total number of alleles: 302 T alleles / (302 T alleles + 242 C alleles) = 0.388 (or approximately 0.39).
Similarly, the C allele frequency is calculated as: 242 C alleles / (302 T alleles + 242 C alleles) = 0.612 (or approximately 0.61).
Therefore, the observed allele frequencies for the T102C locus are T allele frequency = 0.388 and C allele frequency = 0.612.
Learn more about Number click here :brainly.com/question/3589540
#SPJ11
What is the x-intercept of the function graphed below?
Answer:
2, 0
Step-by-step explanation:
The x intercept is always where the line drawn through the graph meets the X Axis on the grid.
Answer:
(2, 0)
Step-by-step explanation:
A cylindrical tank is one-fifth full of oil. The cylinder has a base radius of 80 cm. The height of the cylinder is 200 cm. 1 litre 1000 cm3 How many litres of oil are in the tank? Round your answer to the nearest litre
The number of litres (Volume) of oil that is present in the tank of given dimension is calculated to be 806 litres (approximately).
The volume of any cylinder can be calculated using the formula,
V = πr²h
(Here V is the volume, r is the radius of the base, and h is the height of the cylinder)
As, the cylinder is one-fifth full of oil, which means that it is four-fifths empty. Therefore, the volume of oil in the tank is:
Volume of oil = (1/5) x Total Volume
Substituting the given values, we have:
Total Volume = π(80cm)²(200cm) = 4,031,240 cm³
Volume of oil = (1/5) x 4,031,240 cm³ = 806,248 cm³
Converting cm³ to litres, we have:
1 litre = 1000 cm³
Volume of oil = 806,248 cm³ ÷ 1000 = 806.248 litres
Therefore, after rounding of the final volume (806.248 litres) to the nearest litre, the final answer is found to be 806 litres of oil.
Learn more about volume of cylender :
https://brainly.com/question/16134180
#SPJ4
Approximately how many liters are in 18 quarts?
Answer:
18 liquid quarts ≈ 17 litres
Answer:
18 us liquid quart =17.034 liters
Step-by-step explanation:
1) 1 us liquid quart = 0.946 liter
2) Multiply 0.946 *18 = 17.034
answer. ill give brainliest to whoever answers first correctly
Answer:
∠ W = 30°
Step-by-step explanation:
using the cosine ratio in the right triangle
cos W = \(\frac{adjacent}{hypotenuse}\) = \(\frac{WY}{WX}\) = \(\frac{2\sqrt{21} }{4\sqrt{7} }\) = \(\frac{1}{2}\) \(\sqrt{\frac{21}{7} }\) = \(\frac{\sqrt{3} }{2}\) , then
∠ W = \(cos^{-1}\) ( \(\frac{\sqrt{3} }{2}\) ) = 30°
Find the component form of the vector that translates P(-3,6) to P'(-4,8) .
Vector is the quantity that has magnitude as well as direction. The component form of the vector that translates P(-3,6) to P'(-4,8) is -i + 2j.
What is vector?A vector quantity has both magnitude and direction. It is added using parallelogram law of addition.
The sum of two vector quantities is always a vector quantity.
The sum of two vector quantities can vary from their scalar difference to their scalar addition.
The given points are P(-3,6) to P'(-4,8) .
The vector component form of two points (x₁,y₁) and (x₂,y₂) is given by ,
(x₂-x₁)i + (y₂-y₁)j
Therefore, The vector component form of given points are,
(-4-(-3))i + (8-6)j
-i + 2j.
Hence "The component form of the vector that translates P(-3,6) to P'(-4,8) -i + 2j.
To learn more about vectors click on the following link
https://brainly.com/question/13322477
#SPJ1
PLEAASE PLEASE PLEASE ILL GIVE 35points AND BRAINLIEST IF CORRECt
Answer:
A
Step-by-step explanation:
two numbers that times to make -12 but add to make +4
+6×-2=-12
+6+-2=4
A cat is standing 15 ft from a birdbath that is 3.5 ft tall. The
cat can see a bird on the top of the bath. What is the angle of
elevation from the cat to the bird to the nearest degree?
Step-by-step explanation:
The angle is 13.134 degree
I Hope this is right and help for you
good night :)
3. Jorge needs to buy a new tire and wants to find our the diameter of his current
tires. He looks at the tire and it reads P280/60R15. What is the diameter of the
entire tire (in inches)?
A)6.6 in.
B)15 in.
C)28.2 in.
D)168 in.
Tell how many edges each solid figure has:
Answer:
1. 12
2. 0
3. 9
Step-by-step explanation:
HELP WITH EXPLANATION, NO LINKS
Answer:
3x³ and 6x³, y and 7y
Step-by-step explanation:
Like terms have variables with the same exponents. This fact eliminates choices A, C, D.
The like terms are ...
3x³ and 6x³, 7y and y . . . . . . choice B
please help me out i will mark brainliest!
Answer:
y=-x+2
x+y=2
Step-by-step explanation:
hopefully this helps :)
Answer:
y = -x + 2
x + y = 2
Step-by-step explanation:
y = mx + b
y = mx + 2 (0,2) (2,0)
\(\frac{2 - 0}{0 - 2}\) = \(\frac{2}{-2}\) = -1
y = -x + 2
Ax + By = C
y = -1x + 2
x + y = 2
What is the value of x/3y, when x = 18 and y = 3? A. 3/18 B. 2 C. 3 D. 6
All we need to so substitute and simplify:
18/3(3)
18/9
2
Best of Luck!
5=z/4−3 This is algebra 1
Answer:
z = 32
Step-by-step explanation:
Add 3 to both sides.
5 + 3 = z/4 -3 + 3
8 = z/4
Multiply 4 on both sides. 8 times 4 is 32.
32 = z
Divide the first polynomial by the second. State the quotient and remainder. 2x^(4)-4x^(3)-7x^(2)-10x+14 x+2
When dividing the polynomial \(2x^4 - 4x^3 - 7x^2 - 10x + 14\)by the polynomial x + 2, the quotient is 2x^3 - 8x^2 + 6x - 22 and the remainder is 58.
To perform polynomial division, we follow a similar process to long division. We start by dividing the highest degree term of the dividend by the highest degree term of the divisor. In this case, we divide \(2x^4\) by x, resulting in \(2x^3\). We then multiply the divisor (x + 2) by this result \((2x^3)\), giving us \(2x^4 + 4x^3.\) Next, we subtract this product from the dividend \((2x^4 - 4x^3),\)which leaves us with\(-8x^3 - 7x^2 - 10x + 14\).
We repeat the process by dividing the highest degree term of the remaining polynomial (-8x^3) by the highest degree term of the divisor (x). This yields -8x^2. Multiplying the divisor by this result (-8x^2) gives us -\(8x^3 - 16x^2.\)Subtracting this product from the remaining polynomial results in \(9x^2 - 10x + 14.\)
We continue the process until we have no more terms to divide. After dividing 9x^2 by x, we obtain 9x. Multiplying the divisor by this result (9x) gives us 9x^2 + 18x. Subtracting this from the remaining polynomial \((9x^2 - 10x + 14)\)leaves us with -28x + 14.
Since the degree of the remaining polynomial (-28x + 14) is less than the degree of the divisor (x + 2), we have reached the end of the division process. The quotient is \(2x^3 - 8x^2 + 6x - 22, and the remainder is 58.\)
learn more about polynomial here
https://brainly.com/question/11536910
#SPJ11
Mattress Length: 6.25 in Length: ft
Answer:
the length in ft would be 0.52 but im not entirely sure hope this helps!
Step-by-step explanation:
Pls Help! John wants to prove ABC = to DEF. He Knoes AB = DE and AC = DF. With Screenshot
Answer:
\( \angle A \cong \angle D \)
Step-by-step explanation:
The Side-Angle-Side method cana only be used when information given shows that an included angle which is between two sides of a ∆, as well as the two sides of the ∆ are congruent to the included side and two sides of the other ∆.
Thus, since John already knows that \( \overline{AB} \cong \overline{DE} \) and \( \overline{AC} \cong \overline{DF} \), therefore, an additional information showing that the angle between \( \overline{AB} \) and \( \overline{DE} \) in ∆ABC is congruent to the angle between \( \overline{AC} \) and \( \overline{DF} \) in ∆DEF.
For John to prove that ∆ABC is congruent to ∆DEF using the Side-Angle-Side method, the additional information needed would be \( \angle A \cong \angle D \).
See attachment for the diagram that has been drawn with the necessary information needed for John to prove that ∆ABC is congruent to ∆DEF.
the longer diagonal of a field in the shape of a quadrilateral is 120 m and the length of the perpendiculars from the opposite vertex upon a longer diagonal is 20 m and 30 m find the area of the field Step by Step Explaination
The total area of the quadrilateral field with diagonal 120m is 3000m².
What is quadrilateral?It is defined as a two-dimensional shape with four sides, four vertices, and four corners. There are two main types:
concave and convex. There are also various subcategories of convex quadrilaterals such as trapezoids, parallelograms, rectangles, rhombuses and squares.
Solution according to the given information in the question:
Given, Diagonal (base of triangle)=120m
Height(H₁) = 20m
Height(H₂) = 30m
∴Area of both triangles = 1/2 × base × height
= 1/2 × 120 × (20+30)
= 1/2 × 120 × 50
= 60 × 50
= 3000m²
Thus, the total area of the quadrilateral field is 3000m².
To learn more about quadrilaterals, visit the link below
https://brainly.com/question/13805601
#SPJ1
The Treasury auctioned $2. 5 billion par value 91-day T-bills, the following bids were received: Bidder Bid Amount Bid Price A $500 million $0. 9940 B $750 million $0. 9901 C $1. 5 billion $0. 9925 D $1 billion $0. 9936 E $600 million $0. 9939 The Treasury also received $750 million in noncompetitive bids. Who will receive T-bills, what quantity, and at what price
Average Auction Price is 0.9925the noncompetitive bidders will receive $750 million at a price of $0.9925 per $1 of par value.
To determine who will receive T-bills, what quantity, and at what price, we need to rank the bidders based on the bid prices and allocate the T-bills in descending order of bid prices until the entire $2.5 billion par value has been allocated. The bid prices listed are quoted as a percentage of par value, so we need to calculate the dollar amount bid for each bidder as follows:
Bid Amount = Bid Price × Par Value
For Bidder A:
Bid Amount = 0.9940 × 500 million
Bid Amount = $497 million
For Bidder B:
Bid Amount = 0.9901 × 750 million
Bid Amount = $742.6 million
For Bidder C:
Bid Amount = 0.9925 × 1.5 billion
Bid Amount = $1.48875 billion
For Bidder D:
Bid Amount = 0.9936 × 1 billion
Bid Amount = $993.6 million
For Bidder E:
Bid Amount = 0.9939 × 600 million
Bid Amount = $596.34 million
Total Bid Amount = $3.31874 billion
Since the total bid amount exceeds the $2.5 billion par value of the T-bills being auctioned, we need to allocate the T-bills to the highest bidders until the entire $2.5 billion has been allocated.
Ranking the bidders in descending order of bid prices, we have:
Bidder B with a bid price of $0.9901
Bidder C with a bid price of $0.9925
Bidder D with a bid price of $0.9936
Bidder E with a bid price of $0.9939
Bidder A with a bid price of $0.9940
Allocating T-bills to the highest bidders until the entire $2.5 billion par value has been allocated, we have:
Bidder B will receive $750 million at a price of $0.9901 per $1 of par value.
Bidder C will receive $750 million at a price of $0.9925 per $1 of par value.
Bidder D will receive $500 million at a price of $0.9936 per $1 of par value.
Bidder E will receive $250 million at a price of $0.9939 per $1 of par value.
The noncompetitive bids of $750 million will be allocated at the average auction price, which is calculated as the simple average of the four highest accepted bid prices:
Average Auction Price = (0.9901 + 0.9925 + 0.9936 + 0.9939) / 4
Average Auction Price = 0.9925
Therefore, the noncompetitive bidders will receive $750 million at a price of $0.9925 per $1 of par value.
To learn more about percentage click here
brainly.com/question/16797504
#SPJ4
A circle has a circumference of 452.16What is the radius of the circle?
Answer:this is the answer
Step-by-step explanation:
Please help me with this question.
Answer:
Monica = 48.50
Samuel = 24.25
Kara = 17.25
Step-by-step explanation:
First you write equations as you are reading the text:
m = 2s ("Monica earned twice as much as Samuel")
s = k+7 ("Samual earned 7 more than Kara")
m = 48.50
Next, you convert these equations to solve for s and k respectively.
So, if m=2s, then s=m/2:
s = m/2 = 24.25
Likewise, if s=k+7, then k=s-7
k = s-7 = 17.25
The difference between greatest and least is 48.50 - 17.25 = 31.25
in which number is the digit 3 one hundred times greater than the digit three in the number 2,435
Answer:
3000
Step-by-step explanation:
If your expression contains square roots, during which step of PEMDAS do you solve them?
Answer:
E
Step-by-step explanation:
"If the expression has exponents or square roots, they are to be performed after parentheses and other grouping symbols have been simplified and before any multiplication, division, subtraction and addition that are outside the parentheses."
At the beginning of the school year, 396 students attended the first football game. Attendance at the next was 505 students. Estimate the percent of increase.
Answer:
27.5253% increase
Step-by-step explanation:
i got this answer right on khan academy
For cones with radius 6 units, the equation V=12h relates the height h of the cone, in units, and the volume of the cone, in cubic units
The volume of the cone is 48 cubic units when the height of the cone is 4 units.
The given equation V = 12h represents the volume of cones with a radius of 6 units.
The volume of a cone is given by the formula V = (1/3)πr²h, where r is the radius of the cone, h is the height of the cone and π is the value of pi which is approximately equal to 3.14.
Given that radius, r = 6 units. Therefore, the formula for the volume of the cone can be written as
V = (1/3)π(6)²h= 12h cubic units
As per the problem, this relation is used to find the volume of cones with a radius of 6 units. For instance, if the height of the cone is 4 units, then using the formula above, the volume of the cone can be calculated by substituting h = 4 units.V = 12 × 4= 48 cubic units
Therefore, the volume of the cone is 48 cubic units when the height of the cone is 4 units.
To know more about volume of cone, click here
https://brainly.com/question/29767724
#SPJ11
Help asap please I really need it.
Answer:
Step-by-step explanation:
What is the present value of $12,200 to be received 4 years from today if the discount rate is 5 percent? Multiple Choice $10,027.51 $7,320.00 $10,459.53 $10,538.82 $10,036.97
Answer; present value of $12,200 to be received 4 years from today, with a discount rate of 5 percent, is $10,027.51.
The present value of $12,200 to be received 4 years from today can be calculated using the formula for present value. The formula is:
Present Value = Future Value / (1 + Discount Rate)^n
Where:
- Future Value is the amount to be received in the future ($12,200 in this case)
- Discount Rate is the interest rate used to discount future cash flows (5 percent in this case)
- n is the number of periods (4 years in this case)
Plugging in the given values into the formula:
Present Value = $12,200 / (1 + 0.05)^4
Calculating the exponent first:
(1 + 0.05)^4 = 1.05^4 = 1.21550625
Dividing the future value by the calculated exponent:
Present Value = $12,200 / 1.21550625
Calculating the present value:
Present Value = $10,027.51
Therefore, the present value of $12,200 to be received 4 years from today, with a discount rate of 5 percent, is $10,027.51.
Learn more about present value calculations:
https://brainly.com/question/12736329
#SPJ11
What table represents the relationship “A video game designer makes $35 per hour”?
Answer: the last image that it says on the dollars d: 35,70, 105
got it right
Answer:
Step-by-step explanation:
Answer:
the answer is d
Step-by-step explanation:
did the test
there are 3 60/100 bags of grass seed left in the shed.
Answer:
6/10
Step-by-step explanation:
divide the numerator and denominator by ten to remake the hundredths as tenths