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RideAnS [48]
3 years ago
13

The scores on a test are normally distributed. The mean of the test is 750 and the standard deviation is 70. By using the Empiri

cal rule, what scores fall 3 standard deviations from the mean?
a.610 and 820 b.610 and 960 c.680 and 820 d.540 and 960
Mathematics
1 answer:
melomori [17]3 years ago
5 0
I think it will be B 610 and 820 but im not sure.
Hope This Helps!
~Cupcake
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Georgia [21]

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Step-by-step explanation:

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3 years ago
A bowling alley charges $2.50 per game plus $4 to rent shoes. A second bowling alley charges $4 per game plus $1 to rent shoes.
adelina 88 [10]

Answer:

The person would have to play 2 games for the two bowling alleys to cost the same amount

Step-by-step explanation:

Assume that the number of games that makes the two costs equal is x

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∵ The number of games is x

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∵ A second bowling alley charges $4 per game plus $1 to rent shoes

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→ Subtract 2.50x from both sides

∵ 4x - 2.50x + 1 = 2.50x - 2.50x + 4

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→ Subtract 1 from both sides

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→ Divide both sides by 1.50

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7 0
2 years ago
A skull cleaning factory cleans animal skulls of​ deer, buffalo and other types of animals using​ flesh-eating beetles. The fact
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Answer:

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Step-by-step explanation:

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8 0
2 years ago
The Coffee Counter charges ​$8.00 per pound for Kenyan French Roast coffee and ​$10.00 per pound for Sumatran coffee. How much o
Radda [10]

Answer:

x = 9

y = 9

Step-by-step explanation:

Given :

Let :

Kenyan French roast coffee = x

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Sumatran Coffee = y

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x + y = 18 - - - - (1)

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From (1):

x = 18 - y

Put x = 18 - y in (2)

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2y = 162 - 144

2y = 18

y = 9

x = 18 - y

x = 18 - 9

x = 9

3 0
2 years ago
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