A survey asked only girls to identify their favorite item on the
school cafeteria menu

A. Unbiased sample

B. Biased sample​

Answer:

Step-by-step explanathrty

The area of the square that has a length of 9.6 decimeters will be 92.16 square decimeters.

Every one of the sides of a square is harmonious. Let a be the side length of the square. Then the region of the square is the square of the side length of the square.

Then the area of the square will be

Area of the square = a² square units

The side length of the square is 9.6 decimeters. Then the area of the square is calculated as,

Area of the square = (9.6)²

Area of the square = 92.16 square decimeters

The area of the square that has a length of 9.6 decimeters will be 92.16 square decimeters.

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Answer:

y = -3x + 5

Step-by-step explanation:

To graph a linear equation in slope-intercept form, we can use the information given by that form. For example, y=-3x + 5 tells us that the slope of the line is -3 and the y-intercept is at (0,5). This gives us one point the line goes through, and the direction we should continue from that point to draw the entire line.

The correct basis step for proving the statement P(n) using strong induction is to show that P(8) is true

Strong induction is a method of proving that a statement is true for all values of n by demonstrating that it is true for a base case and that if it is true for all values up to n, then it must also be true for n+1. It can be used to prove the statement P(n) that a postage of n cents can be formed using only 3-cent stamps and 5-cent stamps.

To demonstrate that P(8) is true is to do the proper basis step for strong induction. This is so that we may create an 8 cent postage using a 3-cent and a 5-cent stamp.

The following argument can be used to demonstrate that the basic step is P(8) being true:

A postage of 8 cents can be made with one 3-cent stamp and one 5-cent stamp.

Thus, P(8) must be true.

We don't need to check any other values for the base step because P(n) only depends on the values of P(k), where k n.

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Answer:

D

Step-by-step explanation:

the three main trig functions are

sin = opposite / hypotenuse

cos = adjacent / hypotenuse

tan = opposite / adjacent

( opposite = side opposite of angle , hypotenuse = longest side and adjacent = other side )

Sin(55) = a/c as side a is opposite of the angle and c is the hypotenuse so D might be the answer

cos(55) would be b/c as the adjacent of that angle is b and the hypotenuse is c. B and C show the wrong ratios so B and C can't be the answer

tan(55) would be a/b as side a is opposite of the angle and b is the adjacent, A says c/a which is wrong

so we can conclude the answer is D

The number of different orders in which the three students can give their speeches, we can use the concept of permutations. Permutations are arrangements of objects or elements in a specific order.

The number of permutations of n items taken r at a time can be calculated using the formula: P(n, r) = n! / (n - r)!

In this case, we have three students giving speeches, so n = 3. We want to find the number of different orders, which means we need to take all three students at a time, so r = 3.

Using the formula, we can calculate the number of different orders as follows:

P(3, 3) = 3! / (3 - 3)!
        = 3! / 0!
        = 3! / 1
        = 3 * 2 * 1 / 1
        = 6

Therefore, the three students can give their speeches in 6 different orders.

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Answer:(4,5)

Step-by-step explanation:

Answer:

8(x^2 − 22x + 128)

Step-by-step explanation:

8(x^2 − 22x + 128) Take 8 as a common factor

The equivalent expression that is most useful to find the year where the population is minimum is, 8(x-11)^2+56

A quadratic equation is an algebraic expression of the second degree in x. The quadratic equation in its standard form is ax2 + bx + c = 0, where a, b are the coefficients, x is the variable, and c is the constant term

Given an expression that represents the population from 1998 to 2018,

\(8x^2-176x+1024\)

Let,

\(y=8x^2-176x+1024\)

Which is an upward parabola,

Since, the minimum value of an upward parabola,

\(y=a(x-h)^2+k\)

is find at x = h,

From equation (1),

\(y=8x^2-176x+1024\)

\(y=8x^2-176x+968-968+1024\)

\(y=8(x^2-22x+121)+56\)

\(y=8(x-11)^2+56\)

By comparing,

The population is minimum at x = 11. ( that is after 11 years since 1998 )

Hence, the equivalent expression that is most useful to find the year where the population is minimum is,8(x-11)^2+56

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The Spearman rank-order correlation coefficient is a measure of the direction and strength of the linear relationship between two ordinal variables.

Spearman's rank-order correlation is used when two variables are measured on an ordinal scale.

What is the Spearman Rank-Order Correlation Coefficient?

The Spearman Rank-Order Correlation Coefficient is a non-parametric statistical measure that estimates the relationship between two variables using ordinal data.

It evaluates the strength and direction of a relationship between two variables by rank-ordering the data.

The Spearman correlation coefficient, named after Charles Spearman, calculates the association between two variables' rankings.

The correlation coefficient ranges from -1 to +1. A value of +1 indicates that there is a perfect positive relationship between the variables, whereas a value of -1 indicates that there is a perfect negative relationship between the variables.

In contrast, a value of 0 indicates that there is no correlation between the variables.

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Answer:

D. -2.6-(-12) is positive

C.(-3.7)+(-12) is Positive

A. +(-2.5) is negative

The 40th percentile for X is approximately  67.98. To find the 40th percentile for X, we need to use a standard normal distribution table or calculator.

We first need to standardize the random variable X by subtracting the mean and dividing by the standard deviation:

z = (X - mean) / standard deviation
z = (X - 70) / 8

We can then find the z-score corresponding to the 40th percentile, which is -0.253:

z = invNorm(0.4)
z = -0.253

Using this z-score and the formula for standardizing a random variable, we can solve for X:

z = (X - 70) / 8
-0.253 = (X - 70) / 8
-2.024 = X - 70
X = 67.976

Therefore, the 40th percentile for X is approximately 67.98.

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Using the principle of proportional relationship, the total recommended daily amount of fiber is  34.4 grams

Let x be the recommended daily amount ( in grams ) of the fiber,

So, 32% of x = \(\frac{32}{100}x\) = 0.32x

According to the question,

11 grams is 32% of the recommended daily amount of fiber,

That is, 0.32x = 11

x = 11/0.32 = 34.4 grams

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Answer:

B

Step-by-step explanation:

Step-by-step explanation:

no.

15/20 = 3/4

10/15 = 2/3

Step-by-step explanation:

The square of a number minus TWICE the number is 48

let the number be" X "

X^2-2X-48 = 0

(X - 8)(X + 6) = 0

x = 8 ᴏʀ X = -6

mark brainliest

Answer:

$135

Step-by-step explanation:

15-12=3/2=1.5

12+1.5=13.5

13.5*10=135

Answer:

$1620

Step-by-step explanation:

The area of the lawn is a trapezoid.

Area of a trapezoid = \(\dfrac12(a+b)h\)

where a and b are the parallel sides (bases) and h is the height

Therefore,

\(area=\dfrac12(15+12) \times 10 = 135 \ m^2\)

If the price of sod is $12 per square metre, then

total cost = 135 x 12 = $1620

A quarterback throws an incomplete pass. The height of the football at time t is modeled by the equation h(t) = –16t² + 40t + 7. Rounded to the nearest tenth, the solutions to the equation when h(t) = 0 feet are –0.2 s and 2.7 s.

the solution to be eliminated is -0.2s this is because time do not have negative values

ax² + bx + c = 0 is a quadratic equation, which is a second-order polynomial equation in a single variable. a.

It has at least one solution because it is a second-order polynomial equation, which is guaranteed by the algebraic fundamental theorem. The answer could be real or complex.

Considering the given function, the answer is both real one is negative the other is positive.

The solution in this case represents time, and time of negative value do not apply in real life

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The actual length of a wall by using a scale of 1:150 is 7.5 m.

The drawing scale is the ratio of drawing size to actual size. To determine the scale of the drawing, we need to know about the formula first which is given by :

scale = drawing size : actual size

From that question, we know that :

scale = 1 : 150

drawing size = 5 cm

Based on the scale we can change the formula to

actual size = drawing size / scale

actual size = 5/ (1:150)

actual size = 5 x 150

actual size = 750 cm

Converting to the meter by dividing with 100

actual size = 750/100 m

actual size = 7.5 m

Hence, the actual length of a wall is 7.5 m

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The interest rate for the savings account is 5% after 4 years, $20,000 deposited in a savings account with simple interest earned $800 in interest.

We can use the formula for simple interest to solve the problem:

Simple interest = (Principal * Rate * Time) / 100

where Principal is the initial amount deposited, Rate is the interest rate, and Time is the time period for which the interest is calculated.

We know that the Principal is $20,000 and the time period is 4 years. We are also given that the interest earned is $800. So we can plug in these values and solve for the interest rate:

$800 = (20,000 * Rate * 4) / 100

Multiplying both sides by 100 and dividing by 20,000 * 4, we get:

Rate = $800 / (20,000 * 4 / 100) = 0.05 or 5%

Therefore, the interest rate for the savings account is 5%.

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By using the blockchain to assist and manage the medication improvement process, the blockchain technology presents a possible opportunity to validate the reliability of the network for the manufacture of pharmaceuticals and to accelerate the development of novel pharmaceuticals.

By enhancing the security and transparency of supply chains fundamentally, blockchain can help prevent the sale of fake medications. It may be used without any issues to track the movement of medical products from sellers to customers. Cold chain techniques play a crucial role in the safe transportation of perishable goods including pharmaceuticals, synthetics, and other items. It serves as the cornerstone of a rapidly expanding pharmaceuticals business.

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Answer:

A-$1.65

Step-by-step explanation:

You multiply 1.25 by 4 because each brother bought a bag of chips. Then you subtract that by the total and get $13.20 you divide that by 8 hot dog because each brother got 2 hot dogs. By dividing 8 by the  left over amount from subtracting the chips you get how much each hot dog is worth.

We need to know about z-score to solve the problem. The z-score of the soda is 0.6

A z-score tells you how many standard deviations away an individual data falls from the mean. We can calculate z-score from the standard deviation and mean of the data. In this question we know that the cost of a soda is $1.15 and the mean is $1.00 and the standard deviation is $0.25.We need to calculate the z-score of the soda with the given information.

z-score=x-μ/σ=1.15-1.00/0.25=0.15/0.25=0.6

Therefore the z-score of the soda is 0.6

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Answer:

The statement that is true is B. This can be determined by using the information from openstax.org, which states that the measure of an angle is the amount of rotation from the initial side to the terminal side. Since the radius of circle Q is 7, any point with a distance from the origin that is less than 7 will lie outside of circle F.

Step-by-step explanation:

Let's see

For initial cone

Volume

For new cone

Volume

So

Answer:

16 times

Step-by-step explanation:

\(\textsf{Volume of a cone}=\sf \dfrac{1}{3} \pi r^2 h \quad\textsf{(where r is the radius and h is the height)}\)

If only the radius is changed, the change in volume will be proportionate to the multiplicative factor squared.

\(\sf \implies Volume =\dfrac{1}{3} \pi (ar)^2h=\dfrac{1}{3} \pi (a^2)r^2h\)

Therefore, if the cone is quadrupled (multiplied by 4), the volume of the larger cone will be 4² times greater than the volume of the smaller cone, so 16 times greater than the smaller cone.

Given:

Substituting the given values into the formula:

\(\sf \implies Volume =\dfrac{1}{3} \pi (6)^2(9)=108 \pi \: \:cubic\:units\)

If the radius is quadrupled:

Substituting the new given values into the formula:

\(\sf \implies Volume =\dfrac{1}{3} \pi (24)^2(9)=1728 \pi \: \:cubic\:units\)

To find the number of times greater the volume of the large cone is than the volume of the smaller cone, divide their volumes:

\(\sf \implies \dfrac{V_{large}}{V_{small}}=\dfrac{1728\pi}{108\pi}=16\)

So the volume of the larger cone is 16 times greater than the volume of the smaller cone.

Step-by-step explanation:

10w¹⁰ - 19w⁹ + 6w⁸

= w⁸(10w² - 19w + 6)

= w⁸(2w-3)(5w-2)

The value of the equation after factorization is A = w⁸ ( ( 5w - 2 ) ( 2w - 3 ) )

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

A = 10w¹⁰ - 19w⁹ + 6w⁸   be equation (1)

Now , on factorizing the equation , we get

Taking the common factor as w⁸ , we get

A = w⁸ ( 10w² - 19w + 6 )

On further simplification , we get

A = w⁸ ( 10w² - 15w - 4w + 6 )

Now , on factorizing the equation , we get

A = w⁸ ( 5w ( 2w - 3 ) - 2 ( 2w - 3 ) )

And , the equation will be

A = w⁸ ( ( 5w - 2 ) ( 2w - 3 ) )

Therefore , the value of A is w⁸ ( ( 5w - 2 ) ( 2w - 3 ) )

Hence , the equation is A = w⁸ ( ( 5w - 2 ) ( 2w - 3 ) )

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Given the function :

The general form of the linear function is : y = m * x + b

Where m is the slope

The rate of the change of the linear function = slope of the function

So, the rate of the change = m = 7

Answer: the rate of change or "slope" is 7

Step-by-step explanation:

MATH

Answer:

72

Step-by-step explanation:

Answer:

i can not see it to much do you know if you can make it bigger for me

Step-by-step explanation: