L = 2 W
B = L x W = 2 W²
Side Area = 2 W H + 2 L H = 2 H ( W + L ) = 6 H W
V = 2 W² H = 10
H = 5 / W²
Cost = 15 * 2 W² + 9 * 5/W
= 30 W² + 270/ W
C ` = 60 W - 270 / W²
= ( 60 W² - 270 ) / W² = 0
60 W² = 270
W ² = 270 : 60
W² = 4.5
W = √ 4.5 = 2.12
Cost (min) = 15 * 2 * 4.5 + 30 / 2.12 = 135 + 14.15 = $149.15
Answer: The cost of materials for the cheapest such container is $149.15.
232 = 520 - 2*144
and
808 = 520 + 2*144
which means scores between 232 and 808 fall within 2 standard deviations of the mean, so about 95% of scores fall in this range.
The bigger i believe is 3/4
For 10% it will be 60, for 1% it's 6, 5% it's 30, 30% is 180, And 36% it will be 206
