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Serhud [2]
3 years ago
13

How many prime numbers are there between 45 and 72?

Mathematics
2 answers:
LenKa [72]3 years ago
6 0
Between 45 and 72 are 7 prime numbers :)
laila [671]3 years ago
4 0
There are 47,51,53,59,61,67,71, that is, 7 primes.
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A.22<br> B.68<br> C.118<br> D.119
rjkz [21]
See the attached picture:

4 0
3 years ago
A recently admitted class of graduate students at a large state university has a mean GRE verbal score of 650 with a standard de
hjlf

Answer:

The answer is below

Step-by-step explanation:

The z score is a score used to determine the number of standard deviations by which the raw score is above or below the mean, it is given by the equation:

z=\frac{x-\mu}{\sigma} \\\\\mu=mean, \sigma=standard\ deviation,x=raw\ score\\\\for\ a\ sample\ n:\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }

Given that μ = 650, σ = 50. To find the probability that 5 students who have a mean of 490, we use:

z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{490-650}{50/\sqrt{5} } =-7.16

From the normal distribution table, P(x < 490) = P(Z < -7.16) = 0.0001 = 0.01%

Since only a small percentage of people score about 490, hence the local newspaper editor should write a scathing editorial about favoritism

4 0
3 years ago
How to evaluate this question
Harlamova29_29 [7]
The answer is 16

Refer image for working :-

Drop comments if any doubt arises.

3 0
2 years ago
Read 2 more answers
If 6 1/4 of potatoes cost 40.75 how much would one pound cost
Darya [45]

Answer 6 dollars and 52 cents

Step-by-step explanation: 6 1/4 = (6.25)

40.75/6.25 = 6.52 per unit price

6 0
3 years ago
The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a ru
ioda
Let width of the floor be x feet, them area is
x(x+2)  = 168
x^2 + 2x - 168 = 0
(x - 12)(x + 14) - 0
so x = 12
the floor is 12 ft by 10 ft

the width of the rug should be 10 - 2(2) = 6 feet


4 0
4 years ago
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