A 200 pound sample of a radioactive substance is quickly
decaying at a rate of 13% per
hour.
What is the formula?

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

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

the correct answer is $7.38

step-by-step explanation:

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