The percentage of runners having times less than 14.4 sec is 0.15%. Then the correct option is A.
<h3>What is normal a distribution?</h3>
It is also called the Gaussian Distribution. It is the most important continuous probability distribution. The curve looks like a bell, so it is also called a bell curve.
The times of all 15-year-olds who run a certain race are approximately normally distributed with a given mean (μ) = 18 sec and standard deviation (σ) = 1.2 sec.
The runners have times less than 14.4 sec.
The z-score is a numerical measurement used in statistics of the value's relationship to the mean of a group of values, measured in terms of standards from the mean.

Then the Percentage will be

More about the normal distribution link is given below.
brainly.com/question/12421652
Answers: (n+6)+(-19n-2)= 18n+4
Step by Step:
3n2-5n+6
6n-5n+6
n+6
-8n2-3n-2
-16n-3n-2
-19n-2
Answer: 
<u>Step-by-step explanation:</u>

Answer:
Um try multiplying
Step-by-step explanation:
Answer:
5600*.065=364
5600+364=$5964 in the account at the end of the year.
Step-by-step explanation: