James is trying to determine the height of a building, so he uses a street sign as a reference. The street sign is 6 feet tall and casts a shadow of 3 feet. The two triangles formed in the picture above are similar. If the building casts a shadow of 21 feet, what is the height of the building?
A.45 feet
B.42 feet
C.63 feet
D.11 feet

Pls will give brainliest and all p.s u can zoom in if u cant see plss

5(-9w) put expression in distributive property

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?