Which polynomials are prime? Check all that apply.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Standard deviation of 19,29,21,22,23

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.