Parts for an automobile repair cost ​$173. The mechanic charges ​$32 per hour. If a person receives an estimate for at least ​$253 and at most ​$285 for fixing the​ car, what is the time interval that the mechanic will be working on the​ job?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?