40% of lightbulb produced by shining beauty company have suboptimal performance. 5 bulbs are chosen for test. find the probability that 2 bulbs or less have suboptimal perfor-mance. (b) 40% of lightbulb produced by shining beauty company have suboptimal performance. 500 bulbs are chosen for test. compute approximately the probability that 210 bulbs or less have suboptimal performance. (c) 0.4% of lightbulb produced by light company have suboptimal performance. 500 bulbs are chosen for test. compute approximately the probability that 2 bulbs or less have subopti-mal performance

(a) about 68.3%

(b) about 83.1%

(c) about 67.7%

The area of a rectangle is calculated by multiplying its length and width. That is,
                               A = L x W
Given that area is 2,197, the width is 2197/L. The perimeter on the other hand is the twice the sum of the dimensions. That is,
                         P = 2L + 2(2197/L)
Differentiating the equation and equating the differential to zero. 
                       dP = 2 + 4394(-1/L²) = 0
Solving for L will give us an answer of 46.87 m. Thus, the length and the width of the rectangle are approximately 46.87 m both.