What is the volume of a rectangular prism with the dimensions: base 2 1 2 cm, height 1 1 2 cm, and length 3 1 2 cm?

The diameter of a ball is 8 in. what is the volume of the ball? use 3.14 for pi. enter your answer as a decimal in the box. round only your final answer to the nearest hundredth.

Me with this one question, and i'll upvote the brainliest answer

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.