Fuel efficiency for a certain vehicle is given by F(v) = -0.018v2 + 1.48v + 1.8 where F(v) is the
fuel efficiency in miles per gallon (mpg) for a vehicle traveling v miles per hour (mph).
a. What speed (v) will yield the maximum fuel efficiency? (Round to the nearest mile per hour)

With number 11 ( show how you got the answer)

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7

How do i simply this radical expression?