Apatio in the shape of a semicircle has a diameter of 21 ft.
what is the approximate area of the patio, rounded to the nearest square foot?
use 3.14 to approximate pi star times.

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655