Find the values of the variables 31 wx vy 68​

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?