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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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A sphere has a surface area of about 999 square millimeters. What is the radius, in millimeters, of the sphere
motikmotik

Given that, a sphere has a surface area of about 999 square millimeters.

Formula to find the surface area of sphere is,

S= 4πr² Where r = radius of the sphere and S= surface area.

Given S= 999 square millimeters.

So, we can write:

4πr² = 999

4 * 3.14 * r² = 999 Since, π = 3.14

12.56 *r² = 999

r^2=\frac{999}{12.56} Divide each sides by 12.56.

r² = 79.53821656

r = √79.53821656 Taking square root to each sides of equation.

r = 8.918420071

So, r = 8.918 Rounded to nearest thousandth.

So, radius of the sphere is 8.918 millimeters.

Hope this helps you!

5 0
3 years ago
the coach for a basketball team wants to buy new shoes for her 12 players. super sport is offering a 20%discount on each pair of
Klio2033 [76]
Here are the calculations for Super Sport:

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$788.01 - $741.24 = $46.77

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6 0
3 years ago
Please I need help with this?​
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Answer:

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Step-by-step explanation:

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3 0
3 years ago
If the diagonals first a rhombus are 10 and 24, find the area of the rhombus.
ioda

Answer:

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8 0
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