Answer:
72
Step-by-step explanation:
68 69 71 71 71 73 74 75 75 78 and then cross off each number until you reach the middle. You will see 71 and 73 next to each other, what's in-between those two numbers? 72!
4
similar right triangles
10+2x
the tree would be 40 feet tall in 15 years.
i would say C
