Answer:
d
Step-by-step explanation:
the maximum height is 180 or y=180
Answer: 2
11in
a^2+b^2=c^2 when c is the hypotenuse
10^2+sqrt21^2=c^2
100+21=c^2
121=c^2
11=c
14
28 ÷ 2 equals 14 and 14 is half of 28