Joe's company rents cars to people who are at least 21 years old. which graph best represents the possible ages of people who can rent cars from joe's company? a number line with a closed circle on 21, with shading to the right. a number line with an open circle on 21, with shading to the right. a number line with a closed circle on 21, with shading to the left. a number line with an open circle on 21, with shading to the left.

1st Option is correct that is A number line with a closed circle on 21, with shading to the right.  

Step-by-step explanation:

We are given that,

Joe's company rent car to people who are at least 21 years old.

To find: A graph which represent the given situation perfectly.

Form given Information,

Minimum age required to rent a car from Joe's company is 21 years.

Maximum age has no bound.

⇒ Interval representing  this condition = [ 21 , ∞ )      

Closed at 21 because it is included.

Therefore, 1st Option is correct that is A number line with a closed circle on 21, with shading to the right.  

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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