Please help if you can

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

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

What is the solution to the equation e3x=12? round your answer to the nearest hundredth