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kitam2871
25.08.2019 •
Mathematics
Justin had $24 to buy a gift card for his cousin julie and he found a gift for $22 with 5% sales tax is added on will justin have enough money to buy the gift for julie and if so how much will he pay
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Ответ:
A = 360 ft²
Step-by-step explanation:
Assuming a regular symmetric pyramid
Area will be that of a square of side 10 plus four triangles with base 10 and face height √(12² + (10/2)²) = 13
A = 10² + 4(½(10)(13))
A = 360 ft²
Which is NOT one of your answer choices.
IF, when describing the pyramid, the height given is actually the face SLOPE HEIGHT, THEN the answer is 10² + 4(½)10(12) = 340 ft²
the true pyramid height in this case is
h = √(12² - 5²) = 10.90871... ft.