90x^2+15x-30 (hope this helps)
Answer:
<h2>R = 16 in</h2>
Step-by-step explanation:
The formula of a Surface Area of a sphere:

R - radius
We have

Substitute:
<em>divide both sides by π</em>
<em>divide both sides by 4</em>

Result, Rachel can be certain that the temperature is suitable for her cake.
Th e answer is 5.5
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