This is describing how your graph should be numbered. If I understand it, it is saying that your y-axis should be numbered by 2s while your x-axis should be numbered by 1s.
Below, I have attached an example graph that may help you understand.
Answer:
SA = 2520 ft^2
Step-by-step explanation:
a = 21ft
b = 29ft
c = 20ft
h = 30ft
SA = 2
+ (a+b+c)h
= s(s﹣a)(s﹣b)(s﹣c)
s = 
SA= ah + bh + ch +

SA= (21 * 30) + (29 * 30) + (20 * 30) +

SA = 2520 ft^2
Answer:
Correct, the answer is 515,520
Step-by-step explanation:
576
x895
----------
515,520