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harina [27]
3 years ago
12

The grades for the latest statistics exam are normally distributed. The mean was 93 with a standard deviation of 4. What is the

probability that you will receive a grade
that is between 89 and 97 on this exam?
О 99.74%
47.72%
O 95.44%
68.24%
Mathematics
1 answer:
olga_2 [115]3 years ago
3 0

Answer:68.27%

Step-by-step explanation:

TI84

2nd distr

normalcdf(89,97,93,4)

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y=1472/3

Step-by-step explanation:

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Read 2 more answers
write the equation of the line that is parallel to the line y=-5/3x-2 and goes throught the point (-3,1)
max2010maxim [7]

Answer:

y = (-5/3)x - 4

Explanation:

The equation of a line with slope m that goes through the point (x1, y1) is:

y-y_1=m(x-x_1)_{}

Additionally, two lines are parallel if they have the same slope.

The slope of the line y = (-5/3)x - 2 is (-5/3) because it is the number beside x.

So, the slope of our line is also -5/3.

Therefore, replacing m by -5/3 and (x1, y1) by (-3, 1), we get that the equation of the line is:

\begin{gathered} y-1=-\frac{5}{3}(x-(-3)) \\ y-1=-\frac{5}{3}(x+3) \end{gathered}

Finally, solving for y, we get:

\begin{gathered} y-1=-\frac{5}{3}x-(\frac{5}{3}\cdot3) \\ y-1=-\frac{5}{3}x-5 \\ y=-\frac{5}{3}x-5+1 \\ y=-\frac{5}{3}x-4 \end{gathered}

So, the answer is:

y = (-5/3)x - 4

4 0
1 year ago
Find the perimeter of the swimming pool
loris [4]
12+40+28+12= 92

40-12= 28

92+28= 120

28-12= 16

120+16= 136

P=136

5 0
4 years ago
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