What is the leading coefficient of the polynomial 15x^4-26x^3-18x^6-19x^7

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?

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.