Mathematics, 02.10.2019 22:30 epmeche05
When a car's tire pressure is 30 pounds per square inch (psi), it averages 20.5 mpg of gasoline. if the tire pressure is increased to 35 psi, the car averages 21.1 mpg of gasoline.
answer parts a) through c).
a) if someone drives an average of 23,000 mi per year, how many gallons of gasoline will he save in a year by increasing his tire pressure from 30 to 35 psi?
b.) if gasoline costs $2.00 per gallon, how much will he save in a year?
c.) assume that there are about 140million cars in a country and that these changes are typical of each car, how many gallons of gasoline would be saved if all drivers increased their cars' tire pressure?
Answers: 2
Mathematics, 21.06.2019 20:50
An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.
Answers: 3
Mathematics, 21.06.2019 22:00
Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function
Answers: 1
Mathematics, 22.06.2019 00:50
Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok
Answers: 2
Mathematics, 22.06.2019 01:20
Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site
Answers: 1
When a car's tire pressure is 30 pounds per square inch (psi), it averages 20.5 mpg of gasoline. if...
Mathematics, 10.01.2020 02:31
Mathematics, 10.01.2020 02:31
Mathematics, 10.01.2020 02:31
Social Studies, 10.01.2020 02:31
English, 10.01.2020 02:31
Mathematics, 10.01.2020 02:31
Mathematics, 10.01.2020 02:31
Mathematics, 10.01.2020 02:31