Homework: HW 7.4 Score: 0 of 1 pt
8 of 10 (7 complete)
7.4.21
A certain flight arrives on time 88 percent of the time. Suppose 125 flights are randomly selected. Use the normal approximation to the binomial to ar
(a) exactly 115 flights are on time.
(b) at least 115 flights are on time.
(c) fewer than 106 flights are on time.
(d) between 106 and 115, inclusive are on time.
(a) P(115) =
(Round to four decimal places as needed.)

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

yes the data was not prsented

step-by-step explanation: