15 POINTS FOR FULL ANSWER

6 ft

Step-by-step explanation:

Volume of a prism:

= base area×height

Using pythagoras theorem, find the length (let's call it t) of the other leg of the triangle (base)

17² = 8² + t²

289 = 64 + t²

t² = 225

t = 15 ft

Volume = Base area × height

360 = (½×8×15)×x

360 = 60x

x = 6 ft

A. 10 ≥ 40 - 6b

B. 10 ≥ 40 - 6b

   10 = 40 - 6b

   10 - 40= -6b

   30 = -6b

   5 = -b

   -5 = b

   -5 ≥ b

C. The solution -5 ≥ b means that the most books he can buy, in order to have at least $10 left, is 5 books. He can buy less than 5 books, and he will have more than $10 left.

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