40 Before he started using Monstros Miracle Engine Additive

40 Before he started using Monstro\'s Miracle Engine Additive, Jed\'s truck used two quarts of oil per week. The dealer claimed that the engine additive would reduce oil consumption by 80%. If the claim is true, what will be Jed\'s weeklv oil consumption? quarts o 41 Researchers expect that 16% of adults will have scores greater than 115 on a certain lQ measurement test. If 400 people take the test, how many would be expected to have lQs greater than 115? 42 Aschool district purchased 250 personal computers. This make of computer is available in a number of different colors, or \"flavors.\" The pie chart below shows the distribution according to \"flavor\" of the computers in this purchase. How many were not \"bluebird?

Solution

40) 2 quarts per week

oil consumption reduced by 80%

Reamining consumtion is 20% = 0.2*2 = 0.4 quarts

So, nowoil consumtion per week = 0.4 quarts

41) 16% have IQ greater than 115

So, 16% of 400 = (16/100)*400 = 64 persons