Given that a random variable X is normally distributed with a mean of 2 and a variance of 4, find the value of x such that P(X < x)=0.99 using the cumulative standard normal distribution table
Answer:
6.642
Step-by-step explanation:
Given that mean = 2
standard deviation = 2
Let X be the random Variable
Then X 
N(n,
)
X N(2,2)
By Central limit theorem;
P(X<x) = 0.09
P(X < x) = 0.99
X -2 = 2.321 × 2
X -2 = 4.642
X = 4.642 +2
X = 6.642
Answer:
HELP PLEASE
In this unit, you've learned about trigonometry and its applications to right triangles and real-world scenarios that can be modeled
with right triangles. In such scenarios, sometimes we refer to an angle of elevation or depression. Both types of angles have one side
that is horizontal. From this side, the angle may open up (angle of elevation) or open down (angle of depression). These images show
the difference between the two.
angle of depression
angle of elevation
In this task, you'll apply what you've learned to answer questions about a skateboard ramp that you and your friends are building for
your community skate park. The ramp will lead up to a platform. You'll be using a piece of wood that's 3.5 meters long for the ramp,
and the ramp's angle of elevation will be 28°. Use this figure as a model to answer the questions that follow.
B
platform
ramp
28°
A
C
Part A
I seem to have read the question wrong.
Answer:
She shaded area?
12 x 10 = 120
6 x 7 = 42
42 divided by 2 = 21
Now we subtract both areas:
120 - 21 = 99 of the shaded region.
