Can someone help me with this question

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

The bottom of a vase is a square.each side measury y+11 units.the square has a perimeter of 55 units what is the value of y?

Given: pb tangent pv,pu secants if m = 80° and m = 30°, then m 3 = 55 40 25