Mrs. Boyd surveyed every 4th teacher coming into the building about the average amount of time a middle school student spends on social media. The survey described did not produce valid conclusions due to bias. Which of the following sampling methods should Mrs. Boyd have used for it to be unbiased a Survey the student with the highest GPA in each grade level.
b Survey Ms. Lawson's fourth period math class.
c Survey every 4th student as they enter school.
d Send an email to parents with the survey attached.

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step-by-step explanation:

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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