The time it takes a mechanic to change the oil in a car is exponentially distributed with a mean of 5 minutes. a. what is the probability that it will take a mechanic less than 6 minutes to change the oil? b. what is the probability that it will take a mechanic between 3 and 5 minutes to change the oil? c. what is the probability that it will take a mechanic exactly 5 minutes to change the oil? d. what is the probability that the mechanic will change the oils of two cars during 10 minutes? e. that is the probability that the mechanic will change the oils of four cars during 20 minutes?

a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation:

1,8,15,22,29,36,43,50

step-by-step explanation:

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

where is the diagram? shown below where? ?

step-by-step explanation: