Find an equation for the surface obtained by rotating the line z = 2x about the z-axis. + x²) b. z? = 4(y2 + x?) c. x² = 4(z² + y²) d. x2 = 4(y² + z²) e. y=2/(x² + z?) a. z=2/(y? %3D

Gas mileage actually varies slightly with the driving speed of a car (as well as with highway vs. city driving). Suppose your car averages 29 miles per gallon on the highway if your average speed is 48 miles per hour, and it averages 26 miles per gallon on the highway if your average speed is 65 miles per hour. Answer parts (a) and (b) below. a. What is the driving time for a 2300-mile trip if you drive at an average speed of 48 miles per hour? What is the driving time at 65 miles per hour? The driving time at 48 miles per hour is hours. (Type an integer or decimal rounded to two decimal places as needed.) The driving time is at 65 miles per hour is (Round to two decimal places as needed.) b. Assume a gasoline price of $4.43 per gallon. What is the gasoline cost for a 2300-mile trip if you drive at an average speed of 48 miles per hour? What is the gasoline cost at 65 miles per hour? The gasoline cost at 48 miles per hour is $ (Round to two decimal places as needed.) hours. The…

Assume a varies directly as b². If b is doubled, how will it affect a. Explain your answer in detail and upload your solution. Upload Choose a File Question 7 The mass of the sun is approximately 2 x 1030 kilograms, and the mass of the Earth is approximately 6 x 1024 kilograms. How many more times greater is the mass of the sun than the mass of the Earth? Explain your answer in detail and upload your solution. Upload Choose a File Question 8 JAN 14 MacBook Air