Mathematics: Number 7 i can not figure out for anything. i keep getting the answer of 103.1 but the back of the book says its 88.1 ft squared. can someone show me how to get this answer?

Number 7 i can not figure out for anything. i keep

milkshakegrande101

07.06.2020

You have a semicircle attached to a trapezium

Area of semicircle = 1/2 Pi r^2 = 1/2 + pi * 4^2 = 25.13 ( note r = 1/2 * 8 = 4)

Area of the trapezium = h/2 ( sum of 2 parallel sides) = 1/2 * 6 * (13 + 8)

= 63

Total area = 63 + 25.13 = 88.1 to nearest tenth

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364781

30.01.2021

$15=\frac{c}{3} -2\ \ | \ add\ 2 \ to\ both\ sides \\\\17=\frac{c}{3}\ \ | \ multiply\ both\ sides\ by \ 3\\\\c=17\cdot 3\\\\c= 51$

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