Assume that when adults with smartphones are randomly selected, 55% use them in meetings or classes. If 30 adult smartphone users are randomly selected, find the probability that exactly 21 of them use their smartphones in meetings or classes
The probability is
(Round to four decimal places as needed.)

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363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363

step-by-step explanation:

a bicycle manufacturer uses the given expression to model the monthly profit from sales of a new model of bicycle, where x is the selling price of one bicycle, in dollars.