An architect has a blueprint of a movie theatre he is designing using a scale of 12ft:6 in. After the theatre is built, the screen will be 30 feet high. What is the height of the screen
on the blueprints

a. 15 inches
b. 125 inches
c. 72 inches

Answers; a) 135 degree’s b) 30 degree’s c) 180 or 0 degree’s d) 90 degree’s

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.

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?