After accelerating for 20 seconds, a DeLorean sports car has a wide range of speeds that it can achieve, depending on the traction. The distribution of speed follows an approximately Normal distribution with a mean of 80mph and a standard deviation of 7.7mph. 6.) What percent of runs will give the DeLorean a speed greater than 85mph? Show your work and enter the z- score below. T. Submit

The scores on the Accuplacer test and High School GPAS are normally distributed. The Accuplacer test had a mean of 35 and a standard deviation of 9. High School GPAS had a mean of 2.8 and a standard deviation of 0.2. What high school GPA do you need to equal a score of 56 on the Accuplacer test? Give answer to two decimal placés. Check Answer

A journal published a study of the lifestyles of visually impaired students. Using​ diaries, the students kept track of several​ variables, including number of hours of sleep obtained in a typical day. These visually impaired students had a mean of 9.71 hours and a standard deviation of 2.06 hours. Assume that the distribution of the number of hours of sleep for this group of students is approximately normal. Complete parts a through c. a. Find ​P(x>​12).   ​P(x>​12)=0.13310.1331 ​(Round to four decimal places as​ needed.) b. Find ​P(8<x<​10).   ​P(8<x<​10)=0.35270.3527 ​(Round to four decimal places as​ needed.) c. Find the value a for which ​P(x<​a)=0.3.

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