The function graphed below models the revenue of a company as a function of the price of their product. Approximately what prices result in no revenue? (check all that apply)
A. $0
B. $31.80
C. $2,528,100
D. $63
E. $30​​

Which of the following is the result of expanding the series

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.

What is the value of x in the equation 15(x + 4) - 3 = 4.5(x - 2)?