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1 answer:
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To solve this, set up the equation, 90% of x being .9*x=57. Then, solve for x, x=57/.9=
=6.333
Answer:
60 ft
Step-by-step explanation:
using the sine ratio in the right triangle and the exact value
sin30° = , then
sin30° = =
=
=
( cross- multiply )
AD = 60 ft