You weigh a gallon of 2% milk in science class and learn that it is approximately 8.4 pounds. you pass the milk to the next group, and then realize that you teacher wants it in kilograms, not pound. explain how you can adjust your answer without weighing the milk again. then give you the weight in kilograms.

answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: