Question

Ana is planning to plant roses around the edge of a circular flowerbed having a diamater of 7 feet. If the total cost of planting roses is $176, what is the unit price of planting roses per foot? $____ per foot

Answer 1

$8 per foot​

Step-by-step explanation:

Diameter of the circular flowerbed = 7 feet

Radius of the circular flowerbed = 7/2 = 3.5 feet.

Since she wants to plant roses around the edge, we deal with the circumference.

Circumference of a circle = 2πr

Therefore:

`\begin{gathered} \text{Cirumference of the flowerbed=2x }\pi*3.5 \\ =21.99\text{ ft} \end{gathered}`

If the total cost of planting roses is $176

The unit price of planting roses per foot

`\begin{gathered} =(\$176)/(21.99ft) \\ =\$8\text{ per foot} \end{gathered}`

The unit price of planting roses is $8 per foot.