21 is 56% of what number

37.5

Step-by-step explanation:

21 = 56% of what number

Unknown number = x

56% = 0.56

Rewrite the original equation

21 = 0.56x

Divide both sides of the equation by 0.56

x = 37.5

Hope this helps :)

37.5

Step-by-step explanation:

We have, 56% × x = 21

or,

56

100

× x = 21

Multiplying both sides by 100 and dividing both sides by 56,

we have x = 21 ×

100

56

x = 37.5

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value