Peter pay $79.80 for returning a bicycle for 6 hours, what was the rate per hour​

$13.3 per hour

Step-by-step explanation:

for 6 hour the cost is $79.80

for 1 hour the cost is $79.80/6

$13.3 per hour

The ladder inclined to the wall of the building and its length is 20ft. The ladder forms a 72° angle with the ground. 

We are asked to solve for the distance of the base of the ladder to the building. Thus, we can use SOH CAH TOA and we have the solution below:

cos 72°=adjacent/20ft

adjacent=20*cos72°

adjacent=6.18 feet

The distance is 6.18 feet.