Answer:
a) Percentage of students scored below 300 is 1.79%.
b) Score puts someone in the 90th percentile is 638.
Step-by-step explanation:
Given : Suppose a student's score on a standardize test to be a continuous random variable whose distribution follows the Normal curve.
(a) If the average test score is 510 with a standard deviation of 100 points.
To find : What percentage of students scored below 300 ?
Solution :
Mean ,
Standard deviation
Sample mean
Percentage of students scored below 300 is given by,
Percentage of students scored below 300 is 1.79%.
(b) What score puts someone in the 90th percentile?
90th percentile is such that,
Now,
Score puts someone in the 90th percentile is 638.
Answer:
The angle of elevation is 71.94 degrees.
Step-by-step explanation:
We are given the following in the question:
The front of an A-frame cottage has the shape of an isosceles triangle.
Height,h = 23 feet
Base,b = 15 feet
We have to find the angle of elevation of its roof.
The attached image shows the structure.
We use the relation,
Thus, the angle of elevation is 71.94 degrees.
Answer:
7/8
Step-by-step explanation:
1 + 4x = 8 - 4x
8x = 7
x = 7/8
Step-by-step explanation:
neither of the ones shown have an area of 9.
do you have another choice with a base of 6 and height of 3 or vice versa? because that would be an area of 9
On any right triangle that has 45 degree angles the hypotenuse is the length of the side x sqrt(2)
the answer would be 8 sqrt2