The length of time it takes college students to find a parking spot in the library parking lot follows a normal distribution with a mean of 55 minutes and a standard deviation of 1 minute. find the probability that a randomly selected college student will take between 3.53.5 and 66 minutes to find a parking spot in the library lot.

0.7745

Step-by-step explanation:

Given : The length of time it takes college students to find a parking spot in the library parking lot follows a normal distribution with

Standard deviation :

Let x be the random variable that represents the length of time it takes college students to find a parking spot .

Z-score :

For x = 3.5 minutes

For x = 6 minutes

Now, the probability that a randomly selected college student will take between 3.5 and 6 minutes to find a parking spot in the library lot will be :-

Hence, the  probability that a randomly selected college student will take between 3.5 and 6 minutes to find a parking spot in the library lot will be 0.7745.

0 is its x and y coordinate

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional