A Ladder that is 32 ft long leans against a building. The angle of elevation of the ladder is 70 degrees. To the nearest tenth o
f a foot how high off the ground is the top of the ladder? Explain.
A. 20.3 ft
B. 10.9 ft
C. 26.2 ft
D. 39.1 ft
A. 20.3 ft
B. 10.9 ft
C. 26.2 ft
D. 39.1 ft
1 answer:
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Answer:
3 and 28
Step-by-step explanation:
note ( )(x ) =
= and
( )(4) =
=
=
= 3
-------------------------------------------------------
(f + g)(x) = f(x) + g(x)
f(x) + g(x)
= x² + 2x - 3 + x² - 9 = 2x² + 2x - 12 and
(f + g)(4) = 2(4)² + 2(4) - 12 = 2(16) + 8 - 12 = 32 + 8 - 12 = 28