Question

A circular gift has a 4.75 inch radius. Ilyssa wants to wrap a ribbon that costs $0.50 per inch around the gift. How much money will she spend?

Answer 1

$14.93

Explanation:

If the cost is per inch, then we need perimeter otherwise if the cost was per square inch we would have looked for the area.

Total cost=circumference* cost per inch

Circumference of a circle is given by

`C=2\pi r`

Where r is radius. Substituting 4.75 inch for r then

`C=2\pi* 4.75=29.857142857142\\C\approx 29.86 inch`

Cost=29.86*0.50=$14.93