Find the average rate of change of f(x)= -x^2+4x+2 from x=3 to x=7

Which expression gives the area of the triangle shown below

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?