You are told that a 95% ci for expected lead content when traffic flow is 15, based on a sample of n = 11 observations, is (461.5, 598.3). calculate a ci with confidence level 99% for expected lead content when traffic flow is 15. (round your answers to one decimal place.)

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Ineed with this problem 21 show steps