) (-4/8) ÷ 2/7 =

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-7/4

Step-by-step explanation:

When you are dividing two fractions (or anything in general), you have to take the reciprocal of the number and then you can multiply the first number by the reciprocal of the second number. This will give you the answer. Hence,

(-4/8) ÷ 2/7

= -4/8 x 7/2

= (-4*7)/(8*2)

= -28/16

Simplifying it:

Dividing the numerator and denominator by 4:

-7/4

Hence, the answer is -7/4

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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