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
Because this is a parallelogram, we know that the diagonals bisect. This means that AO = DO, and CO = BO
It doesn't matter which two segments we use, but I'm going to use CO = BO for this one.
3x - 7 = x - 1
2x = 6
x = 3
Option B. is the answer.
Remark
Good golfers never slice the ball. They occasionally may hook it but they seldom if ever slice it. If he only slices it 10 years and his shot is 275 yards from the tee, his straight line distance from the hole is hardly noticeable from 478 - 275 = 203. It will take a couple of decimal places I would think to notice the difference.
If he shot the first shot straight down the middle of the fairway, his distance to the flag would be exactly 203 yards. Since he is 10 yards off the center line. You need to employ the Pythagorean theorem twice. The first time to figure out what that slice has cost him. His tee shot is 275 yards. The straight line distance is (b).
a=10
b = ??
c = 275
a^2 + b^2 = c^2
10^2 + b^2 = 275^2
100 + b^2 = 75625
b^2 = 76625 - 100
b^2 = 76525
b = sqrt(76525)
b = 274.82
So his straight line distance is 475 - 274.82 = 200.18
Now what you need to do is take another shot from 10 yards of the straight line distance.
a = straight line distance = 200.18
b = 10
c = actual distance
a^2 + b^2 = c^2
200.18^2 + 100 = c^2
40072.78 + 100 = c^2
c = sqrt(40172.78)
c = 200.43 yards. Answer
Answer:
f(-4) = -9
Step-by-step explanation:
f(x)=2x-1
Let x = -4
f(-4)=2*-4-1
= -8 -1
= -9
The answer would be -9. I hope this helped! Good luck! :)