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BabaBlast [244]
3 years ago
5

In a research sample of high school students, the variable “number of Instagram followers” formed normal distribution with a mea

n of 45 and a standard deviation of 16. If the research sample contained 500 students, approximately how many had 21 or fewer friends?
A)7
B)467
C)21
D)33
Mathematics
1 answer:
Papessa [141]3 years ago
5 0
Approximately it would be C 21
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Solve the inequality -2x < 5, illustrating your solution on a number line.
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Answer:

No.

Step-by-step explanation:

Let's first and try to isolate x.

-2x < 5

(Divide by -2)

x > -5/2 ( < changes to > b/c it was divided by a negative)

x > -2.5

Since x is all values greater than -2.5, -6 is not within those bounds.

Thus, -6 is not a solution to the inequality.

Hope that helps!

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How do you make the denominators of two fractions the same? HELP PLS DUE IN 3 MINS AAAAAA
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A. Multiply the numerator and the denominator of each fraction by the denominator of the other fraction.

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What is the measure of angle A' B' C'?​
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3 years ago
An electric company has to track on-time payments and late payments for each customer monthly. It is impossible for a customer t
OLga [1]

Answer:

The  probability that a customer pays late each month is    P(B)  =  0.27

Step-by-step explanation:

Let     P( A ) be the probability that the customer pays on time and the value is  0.55

Let  P( B )  be the  probability that a customer pays late each month

So

  The probability that a customer pays late or on-time each month  is  P(A u B) and  the value is  0.82

The probability that a customer pays on-time and late each month is  P(A n B) and  the value is  zero ( 0 ) given that it is impossible

   Now The probability that a customer pays late or on-time each month  is mathematically represented as

      P(A u B)  =  P(A) +  P(B)  -   P(A n B)

=>     0.82  =  0.55 + P( B ) -   0

=>    P(B)  =  0.27

8 0
3 years ago
The expressions V 60+ n and V2n + 28.
laiz [17]

Answer:

1.→n=15

2.→n=0

Step-by-step explanation:

The two expressions given are

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We have to find smallest value of n, for which each of these two expressions will be rational.

So, 1.→n=15

and 2.→n=0

Have a nice day! -Alpha

7 0
4 years ago
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