After accelerating for 20 seconds, a DeLorean sports car is a wide range of speeds that it can achieve, depending on traction. The distribution of speed follows in approximately normal distribution with the meaning of 80 mph and a standard deviation of 7.7 mph Marty wants the next acceleration run to be in the fastest 15% of all possible speeds how fast will the car have to go

72mph

Explanation:

z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

z score for 15th percentile = -1.036

Mean = 80 mph

Standard deviation = 7.7mph

Hence,

-1.036 = x - 80/7.7

Cross Multiply

-1.036 × 7.7 = x - 80

- 7.9772 = x - 80

x = 80 - 7.9772

x = 72.0228mph

Approximately 72 mph

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

the part of the wave he is travelling on is the crest