When 10b=5(√c+2) is solved for c, one equation is c=(2b-2)^2 which of the following is an equivalent equation to find c?
a. c=10b-10-5
b. c=(10b-10-5)^2
c. c=(10b-2)^2/25
d. c=(10b-10)^2/25

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step-by-step explanation:

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answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

other answer is correct. i had used the radius of the radius somehow. a website: