Bobby claims that Peter started with 21 cards. Which statements are true about verifying Bobby's claim? Check all that apply.

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i