What is the approximate volume of a cone with a height of 9 ft and radius of 3 ft?

use 3.14 to approximate pi, and express your final answer to the nearest hundredth.

i got the answer 84.78 from doing (1/3)(3.14)(9)(9), but i'm not sure how to round it.
correct me with an explanation if i am wrong.

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

Malia is observing the velocity of a cyclist at different times. after two hours, the velocity of the cyclist is 15 km/h. after five hours, the velocity of the cyclist is 12 km/h. part a: write an equation in two variables in the standard form that can be used to describe the velocity of the cyclist at different times. show your work and define the variables used. (5 points) part b: how can you graph the equations obtained in part a for the first 12 hours? (5 points) if you can try and make this as little confusing as you can

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'