What is the area of a circle with the diamter of 10cm?

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Step-by-step explanation:

Using the formulas

A=π r^2

d=2 r

Solving for A

A=1/4πd^2=1/4·π·10^2≈78.53982cm²

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

step-by-step explanation: