Answer:
1st:

2nd:

3rd:

Step-by-step explanation:
Graph all of them and see which ones cross the x- axis at the same points.
Answer:
$69
Step-by-step explanation:
$115 x 0.4 = $46 discount
$115 - 46 = $69
Step-by-step explanation:
6 times 9 is 54.
54 divided by 2 is 27 volume ( recipitor) is 27 for no.1
6 times 7 is 42
42 divided by 2 is 21 is the recipitor or volume for no.2
there fore a has a bigger base surface
as base is measured by recipitorial angles
sorry if this isnt the right answer or what u wanted but I know it this way