2 It takes Aisha 84 seconds to run one lap of an athletics track. It takes Brenda 96 seconds to run one lap of the athletics track.
They set off from the start line at the same time.
a After how many seconds will they cross the line together for the
first time? (Assume they keep running at the same speed.)

672

Step-by-step explanation:

the factors of 84 are 3 2 2 7

the factors of 96 are 2 2 2 2 2 3

the factors of the lowest common multiple will be 2 2 2 2 2 3 7

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