The lengths of giraffes necks at the zoo are normally distributed with an average of 6 feet with a standard deviation of 1. There are 40 giraffes running around the zoo. a) what percentage of giraffes have a neck length between 5 & 7 feet?
b) what percentage of giraffes have a neck length less than 4 feet?
c) how many giraffes have a neck length between 7 and 8 feet?
d) how many giraffes have a neck length greater than 5 feet?

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much