Hello' if you can please show the steps too that would be much appreciated! (And please don't put a random answer just for the points)

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Cate purchases $1600 worth of stock and her broker estimates it will increase in value by 4.2% each year. after about how many years will the value of cate's stock be about $2000