Data are drawn from a symmetric and bell shaped distribution with a mean of 120 and a standard deviation of 5. There are 900 observations in the data set. What percentage of observations are less than 130? How many observations are less than 130? This is suppose to be two different questions but they seem the same to me. Please please please help me.

Answers

Answer 1

Answer: How many requests an actual number, not a percent. To get the number from the percentage, assume you've got p% observations (which is 97.5%). The actual number of observations is p*900/100, that is 9 times the 97.5% or 877.5 observations (I know, odd thing you get a non-integer). I guess I got the wrong percentage (I don't do statistics just yet at school ;) )

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Factor 360t + 10t3 - 120t2. answer chocies:a. 10t(t - 6)(t + 6)
b. 10t(t - 6)2
c. -10t(t - 6)(t + 6)

Answers

the answer is B. i showed my work in the picture attached

Answer:

10t(t - 6)2

Step-by-step explanation:

In the fifth grade at Lenape Elementary School, there are 3/4
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Answers

Answer:

47 girls

Step-by-step explanation:

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A loan of $900 will be repaid in 36 installment payments of $30.22 each. What the finance charge for the loan?

Answers

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Answers

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x =18
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Answers

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Can someone help me figure this out? The explanation gave me no idea on how to do this.

Answers

by solving both equations:
(x^4 + 5x^2 -36) = 0 (2x^2 +9x-5)=0
(x^2 -4) ( x^2 +9) = 0 (2x-1) ( x+5) = 0
(x-2) (x+2) (x^+9) = 0 (2x-1) (x+5) = 0
So from this w get :
x = 2 , -2
x= 1/2
x = -5
x= 3i , -3i
and write them in the cells

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