Mathematics, 02.08.2019 16:00 tthompson7186
Ahealth clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. the sterilization tank contains 120 gal of a solution of 4% ordinary household bleach mixed with pure distilled water. new research indicates that the concentration of bleach should be 7% for complete sterilization. how much of the solution should be drained and replaced with bleach to increase the bleach content to the recommended level?
Answers: 1
Mathematics, 21.06.2019 14:30, GreenHerbz206
Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.
Answers: 3
Mathematics, 21.06.2019 20:00, chantelporter713
Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line
Answers: 1
Mathematics, 22.06.2019 03:30, carjsan5656
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.
Answers: 2
Ahealth clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. the...
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