The times of all 15 year olds who run a certain race are approximately normally distributed with a given mean Mu = 18 sec and standard deviation Sigma = 1. 2 sec. What percentage of the runners have times less than 14. 4 sec?.
Answers
Question
The times of all 15 year old who run a certain race are approximately normally distributed with a given mean Mu = 18 sec and standard deviation Sigma = 1. 2 sec. What percentage of the runners have times less than 14. 4 sec?.
Answer:
A. 0.15%
Step-by-step explanation:
The times of all 15 year old who run a certain race are approximately normally distributed with a given mean as 18 sec and standard deviation as 1.2 sec.
We know that,
where,
X = raw score = 14.4
μ = mean = 18
σ = standard deviation = 1.2
Putting the values,
Finding the the probability from z score table, we get
Answer:
a
Step-by-step explanation:
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Answers
because your grouping them..
for example your groping the ones that are in brackets and the ones that are not
Answers
Answer:The cost for the month is $240.
Step-by-step explanation:
Since we have given that
Cost for the two i.e Aveeno and her boyfriend = $40
They were charged 6 times in a month.
As we know that times stands for multiplication.
So, we need to find the cost for the month, where we multiply 6 with $40 to get the amount for the whole month.
So, the amount for the month would be
Hence, the cost for the month is $240.
Answers
Please write correctly.
g(x)= (2x+3)/(x+1) to be written like a/(x+p) + q
It is very simple!
(2x+3)/(x+1)= [(2x+2)+1]/(x+1)= (2(x+1)+1)/(x+1)= 2+1/(x+1)
Answers
Unitrate is the quantity of an amount of something at a rate of one or another quantity.
Speed is the rate at which the car is traveling x miles per hour
Speed = Distance / Time
The distance that the car traveled in 7 hours at a speed of 126 miles in 3 hours is 294 miles.
What is a unit rate?
It is the quantity of an amount of something at a rate of one of another quantity.
In 2 hours, a man can walk for 6 miles
In 1 hour, a man will walk for 3 miles.
We have,
A car traveled a distance of 126 miles in 3 hours.
This can be written as,
126 miles = 3 hours
Multiply both sides by 3.
42 miles = 1 hour
Multiply 7 on both sides.
7 x 42 miles = 7 x 1 hour
294 miles = 7 hours.
This means that,
In 7 hours 294 miles are traveled.
Thus,
The distance that the car traveled in 7 hours at a speed of 126 miles in 3 hours is 294 miles.
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If you break down to it's unit rate (126 / 3) you get 42, which is the speed per hour. Now multiply by 7 hours and you get 294 :^]
Answers
3/4 = 6/8
1/8 + 6/8 = 7/8
2 + 1 = 3
3 + 7/8 = 3 7/8
There is a total of 3 7/8 cups of flour.
Answer:
Step-by-step explanation:
osha is making muffins for breakfast. The recipe calls for 2 cups of white flour and 1 cups of wheat flour. What is the total amount of flour in the muffin recipe?
3 cups
3 cups
3 cups
4 cups
Answers
The 10 1/3 written as the improper fraction31/3.
To convert the mixed number 10 1/3 into an improper fraction, follow these steps:
Multiply the whole number (10) by the denominator of the fraction (3):
10 × 3 = 30
Add the result from step 1 to the numerator of the fraction (1):
30 + 1 = 31
Place the result from step 2 over the original denominator (3) to form the improper fraction:
10 1/3 = 31/3
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Answer:
31/3
Step-by-step explanation: