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Find the surface area of a sphere with a radius of 10 in. Express your answer in terms of π.

A: 400π in2

B: 800π in2

C: 500π in2

D: 1,600π in2

Jamie is hiking up a small mountain. he climbs up at a constant rate of 300 feet/hour until he reaches the peak at 1,500 feet. after that, he hikes down at the same rate to the base of the mountain. the equation that models jamie’s elevation, e, after t hours is e = . jamie’s elevation will be 600 feet after hours and after hours.

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !