The answer is box b, by $0.48
Calculate the surface area of rectangular prism is A = 2 (wl + hl + wh)
w - width, l - length, h - height
The cost is $0.03 per square inch: C = .0.03 * A
Box a:
l = 8 in
w = 3 in
h = 6 in
A = 2 (wl + hl + wh) = 2(3 * 8 + 6 * 8 + 3 * 6) = 2(24 + 48 + 18) = 2 * 90 = 180 in²
C = 0.03 * A = 0.03 * 180 = $5.40
Box b:
l = 10 in
w = 3 in
h = 4 in
A = 2 (wl + hl + wh) = 2(3 * 10 + 4 * 10 + 3 * 4) = 2(30 + 40 + 12) = 2 * 82 = 164 in²
C = 0.03 * A = 0.03 * 164 = $4.92
Thus, it is less expensive to cover box b with foil by $5.40 - $4.92 = $0.48
Answer:
3/2
Step-by-step explanation:
Okay, I can represent this equation as rise over run
the coordinates 4,6 are subcoordinates 1
y: 6 - 3 = 3
x: 4 - 2 = 2
Since it is RISE over run then Y is the numerator and X is the denominator.
So the slope is 3/2.
The correct answer is -18
X is greater than or equal to -2 and x is less than 4
Answer:
5
Step-by-step explanation:
3^2 + 4^2 = 5^2