So 3 times a number is between -18 and 18
between means it cannot be -18 or 18 so
3 times x=3x
x=unknown
3x
< less than
>greater than
if it is between -18 and 18 then the number is >-18 and <18 so
-18<3x and
18>3x
divide both equations by 3
-6<x
6>x
combine
-6<x<6
solution set=(x|-6<x<6)
Answer:
0.1587
Step-by-step explanation:
Let X be the commuting time for the student. We know that . Then, the normal probability density function for the random variable X is given by
. We are seeking the probability P(X>35) because the student leaves home at 8:25 A.M., we want to know the probability that the student will arrive at the college campus later than 9 A.M. and between 8:25 A.M. and 9 A.M. there are 35 minutes of difference. So,
= 0.1587
To find this probability you can use either a table from a book or a programming language. We have used the R statistical programming language an the instruction pnorm(35, mean = 30, sd = 5, lower.tail = F)
Answer:
0.75CM^2 and 10 secs
Step-by-step explanation:
And then its 10 seconds for part 2
OH BTW U NEED TO DRAW A TANGENT