# 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.

### Another question on Mathematics

Mathematics, 21.06.2019 15:30
With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.
Monthly water bills for a city have a mean of $108.43 and a standard deviation of$32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual? Answers: 1 Mathematics, 21.06.2019 18:00 Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for$2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of$70. how many hot dogs did the group buy?