Rebecca is climbing up a 500-foot cliff. By 1:00 P. M., she has climbed 125 feet up the cliff. By 4:00 P. M., she has reached
an altitude of 290 feet. Find the average rate of change in
Rebecca's altitude during the three hours. Give the rate in feet
per bour.

Step-by-step explanation:

(290 ft - 125 ft)/(3 hours) = (165 ft)/(3 hours) = 55 ft/hour

answer: 5100 just subtract

step-by-step explanation:

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