Jack's Plumbing charges customers $100 per hour for repair jobs. A-1 Plumbing charges according to the equation y=75x+50 , where x = time in hours and y = cost in dollars. Explain why A-1 Plumbing charges less than Jack's Plumbing for a 4‑hour repair job. Does A-1 Plumbing charge less than Jack's Plumbing for all repair jobs? Explain why or why not.

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Arecent study focused on the number of times men and women who live alone buy take-out dinner in a month. assume that the distributions follow the normal probability distribution and the population standard deviations are equal. the information is summarized below. statistic men women sample mean 24.85 21.33 sample standard deviation 5.54 4.93 sample size 34 36 at the 0.01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? state the decision rule for 0.01 significance level: h0: μmen= μwomen h1: μmen ≠ μwomen. (negative amounts should be indicated by a minus sign. round your answers to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? what is the p-value? (round your answer to 3 decimal places.)