While riding her bike to the ocean and back home 7 7 times, corinne timed herself at 52min 52⁢min , 63min 63⁢min , 66min 66⁢min , 60min 60⁢min , 51min 51⁢min , 69min 69⁢min , and 50min 50⁢min . she had set a goal of averaging 59 59 minutes for her rides. how many minutes will she need to spend on her eighth ride to attain her goal? this is a late assignment, a girl out hah..

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.

Leila is buying a dinosaur model. the price of the model is xxx dollars, and she also has to pay a 7\%7%7, percent tax.

X- 3 = 4 solve this algebraic expression