Joanna's pay for working overtime varies jointly as the number of hours she works and her hourly pay rate. if her overtime pay is $103.44 when she works 8 hours at an hourly rate of $8.62, then find the number of hours worked when her overtime pay is $213.75 at an hourly rate of $9.50.

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

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f