Keisha plans to both run and swim. Let r and let a be to number for swimming and running each lap she runs takes her 5 minutes, and each lap she swims takes her 2 minutes she wants to exercise for at least 40 hours today.

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

d. all of the above

step-by-step explanation: