HELP Which step is the same in the construction of a perpendicular line through a point on a line and the construction of a perpendicular line through a point off a line?

Create only one arc on the original line.
Create two arcs on the original line.
Place the compass on only one point off the original line.
Place the compass on only one point on the original line.

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

Secant be and cf intersect at point d inside a what is the measure of cde

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8