Answer:
$9 per flower
Step-by-step explanation:
divide cost ($90) by the number of items (10 flowers)
F - 12 = -35
f - 12 + 12 = -35 + 12
f = -23
Answer: C
Step-by-step explanation:

We do not have the radius, but we do have the diameter. A diameter is twice the radius, therefore we can divide the diameter by 2 in order to obtain the radius.

Plug this info into the formula.
