Express the confidence interval 0.491 ± 0.057 in the form of p-E < p A) 0434 B) 0.434 C) 0.491 D) 0.4625 < p <0.5195.

0.424<0.538

Step-by-step explanation:

Given the confidence interval 0.491 ± 0.057, we are to express in the form

p-E < p + E where E is the error

From the interval E = 0.057, p = 0.591

p±E = (p+E, p-E)

0.491 ± 0.057 = (0.491-0.057, 0.491+0.057)

0.491 ± 0.057 = (0.434, 0.548)

Hence the interval in the form

p-E < p + E is 0.424<0.538

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.