Given that X the time to complete a standardized exam in the BYU-Idaho Testing Center is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes.

We have 68 rule as 2/3 of total would lie within 1 std deviation, and 95 rule as nearly 95% lie within 2 std deviations from the mean.

We have std deviation = 10

Hence 2 std deviations from the mean

= Mean ±2 std deviations

= $70$ ±20

= $(50,90)$

Below 50, 0.25 or 2.5% would complete the exam.

3 0

3 years ago

Hello, I have a Pi Day Question for you, it's pretty simple.

stira [4]

The value of pi is 3.14

7 0

3 years ago

Double points plz help

tangare [24]

When x is 100 y will be 122

5 0

3 years ago

james has decided to start saving for a cruise over the summer. his money is currently in the local bank modeled by the function

steposvetlana [31]

In the scenario above, James can we create a function to combine the two by f ( x ) = 8 x + 118.

<h3>What is the simplification about?</h3>

In the question above, to be able to create a function, we have to show that;

s ( x ) = 102

a ( x ) = 8 ( x + 2 )

So, a function that combines the two will be:

f ( x ) = s ( x ) + a ( x ) = 102 + 8 ( x + 2 ) =

= 102 + 8 x + 16

Therefore f ( x ) = 8 x + 118

Learn more about simplification from

brainly.com/question/723406

#SPJ1

3 0

2 years ago