Answer:
A score of 150.25 is necessary to reach the 75th percentile.
Step-by-step explanation:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
A set of test scores is normally distributed with a mean of 130 and a standard deviation of 30.
This means that 
What score is necessary to reach the 75th percentile?
This is X when Z has a pvalue of 0.75, so X when Z = 0.675.
A score of 150.25 is necessary to reach the 75th percentile.
- Obtuse = one side is more than 90 degrees
- Acute = all sides are less than 90 degrees
- Isosceles = two sides are of the same length
- Equilateral triangle: all angles are of same measure (60)
- Scalene: all sides are of different lengths
- Right Triangle: One of the angles equals 90 degrees.
That is simple all you have to do is multiply the number of white cars by 9 and you will get your answer. 40*9=360
Answer:
A beach in the next war with a friend of a friend of a
Answer:
$48
Step-by-step explanation:
Ashton is saving money for a new bike. He needs 120$ But only has saved 60% so far. How much more money does he need to buy the scooter
Ashton needs money for new bike=120$
savings of ashton is 60 % of his bike cost
hence 60% of 120 dollar will be
His saving=(60/100)*120=7200/100=72$
remaining cost will be obtained by subtracting saved money from total cost
total cost=120 dollar
saved money=72dollar
hence
Remaining more money he needed is =120-72=48$
