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GarryVolchara [31]
3 years ago
8

the grades recieved by 300students follow a normal distribution. the mean of the grades is 75% and the standard deviation is 8%.

A. how many students recieved a grade greater than 75%? B. how many students recieved a grade higher than 91%?
Mathematics
1 answer:
tiny-mole [99]3 years ago
3 0

Answer:

Correct answers ended up being 6.7% for an A.       100- 93.32= 6.68 round one place 6.7 %

For B it's    93.32 - 69.1463 = 24.17  round one place so   24.2%

Step-by-step explanation:

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8+11=19 but if you add 21+19+12+5=57.
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What is the slope of the line through (-9,6) and (-6,-9)
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△ABCis reflected to form​​ ​△A′B′C′​. The vertices of △ABC are A(3, 1), B(1, 5), and C(6, 9). The vertices of △A′B′C′ are A′(−1,
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Answer:  D) reflection across y = -x

Explanation:

When we reflect over y = x, we basically swap x and y. So for instance, the point (3,1) becomes (1,3).

When reflecting over y = -x, we will do the same thing but we'll make each coordinate swap in sign from positive to negative (or vice versa). The rule for reflecting over y = -x is (x,y) \to (-y,-x)

So if we apply that rule to point A(3,1) then it becomes A ' (-1, -3).

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Tcecarenko [31]

Answer:

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<u>Using the given data we can have the equation below to the time:</u>

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