Pls help 30 points what 3d object is generated by rotating the rectangle about the x-axis.

a. a cylinder. with a radius of 2 and height 4

b. a cone with a radius of 4 and height 2

c. a cone with radius2 and height 4

d. a cylinder. with a radius of 4 and height 2

Plz which expression is equivalent to the expression below?

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.