Please answer this. I have a limited amount of time.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Find the distance between (7,-6) and (-3,-9)

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.