Question

Enter your answer and show all the steps that you use to solve this problem in the space provided.

The diameter of a tire is 2.5 ft. Use this measurement to answer parts a and b. Show all work to receive full credit.

Find the circumference of the tire.
About how many times will the tire have to rotate to travel 1 mile? (1 mile = 5,280 ft)
this is my answer
part A 7.85 we do 3.14 x 2.5 witch equals 7.85
3.14 x 2.5= 7.85
then we do part B and part B is 5,280 / 7.85 which equals 672 5,280 / 7.85= 672 so to travel 1 mile the tire have to rotate 672 times
i want to know if my answer is correct and if i did good

Answer 1

a) The circumference of a circle is the perimeter of the circle. The circumference of the circle is the distance around a circle, that is the arc length of the circle. The circumference of a circle is given by:

Circumference = 2π × radius; but diameter = 2 × radius. Hence:

Circumference = π * diameter.

Given that diameter of the tire = 2.5 ft:

Circumference of the tire = π * diameter = 2.5 * π = 7.85 ft

b) since the circumference of the tire is 7.85 ft, it means that 1 revolution of the tire covers a distance of 7.85 ft.

1 mile = 5280 ft

The number of rotation required to cover 1 mile (5280 ft) is:

number of rotation =

Explanation:

Thats the best i can find.

Answer 2

Your answer is correct and you showed all the necessary steps to find the circumference and the number of times the tire would have to rotate to travel one mile. Well done!