Kim loves ballet if she does it fir 1/4 hours a day 7 days a week, how many hours of ballet does she do each week

I'll give brainliest if you answer right : )

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16