Macy’s is having their family and friends’ sale. They are having 60% off everything. Janyla says that she can find the sale price of an item that has a regular price of p by evaluating the
expression 0.40p. Nalia says that she can find the sale price for the same item by evaluating the
expression p – 0.60p. Who is correct? (Hint: Substitute a value for p. Use the same number for
both expressions to see if you get the same answer.

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.