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Subtract the 7 from 8, which would then get you...

Answer:
See the net of the prism in the attachment
<u>It has 6 faces with sizes:</u>
- Two off 4 in x 25 in
- Two off 7 in x 25 in
- Two off 4 in x 7 in
Well the measure of angle 1 in problem 1 is 62, in problem 2 is 90, problem 3 is 45, and problem 4 is 60
So the actually surface area can be split up by dif parts....meaning
2 side is 2.7*3.2*2 = 17.28
2 side is 3.2*2.1*2 = 13.44
2 sides is 2.1*2.7*2= 11.34
then u add up the areas = 42.06ft^2
then u look for what is the clossest...and that is 42gt^2
For the equation of the line expressed as Ax + By + C = 0, the value of the slope (m) is calculated by -A / B. For perpendicular lines, the slope of one should be the negative reciprocal of the other. From the choices given, the lines that are perpendicular is Option A.