Solve for r. s=2πrh

a. 2πsh=r2πsh=r

b. s/2πh=rs2πh=r

c. s/2π=rs2π=r

d. s/2=r

A brand of cereal had 1.2 mg of iron per serving. Then they changed their recipe so they had 1.8 mg of iron per serving. What was the percent increase in iron?

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How do you solve c for a/b=c

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