The area of a square with sides of 2 feet is 4 square feet. the area of a square with sides of 4 feet is 16 square feet. what equation fits this data?
choices

y=4x
or
y=x+2
or
y=x squared
or
y=2x

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

-2 is the right