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Effectus [21]
3 years ago
11

find the percent of change from June to September in the time to run a mile (the June time is 7:45 and the September time is 5:5

1)
Mathematics
1 answer:
Leviafan [203]3 years ago
7 0

Answer:

74% change

Step-by-step explanation:

Percentage is the fraction between two values usually the obtained value against the total obtainable value and multiply by 100.

% change = (value in September / value in july) * 100

% change = (5.51 / 7.45) * 100

% change = 0.7395 * 100

% change = 74%

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A set of mathematics exam scores are normally distributed with a mean of 80.280.280, point, 2 points and a standard deviation of
hichkok12 [17]

Answer:

0.3745

Step-by-step explanation:

Data

mean (\mu): 80

standard deviation (\sigma): 4

Normal distribution table is in figure attached .

Z = \frac{x - \mu}{\sigma
}

Z = (85 - 80)/4 = 1.25

Area below curve = 0.3944

Z = (82 - 80)/4 = 0.5

Area below curve = 0.0199

Proportion of exam scores between 82 and 85?

0.3944 - 0.0199 = 0.3745

5 0
3 years ago
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One page of a petition can hold p signatures. You were able to get 4p+5 people to sign the petition. Your friend was able to get
leva [86]

Answer:

6p - 2

Step-by-step explanation:

The expression that needs to be made in this question refers to the total number of people that signed the petition. To calculate this we need to add the total number of signatures that both you and your friend were able to acquire. Once we do this we simply combine like terms in order to simplify the expression as much as possible.

4p + 5 + 2p - 3

4p + 2p + 5 - 3

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Therefore, the total and simplified expression for the total number of signatures would be 6p - 2

8 0
3 years ago
How do you get coterminal angles with radians in calutator in fraction form?
Natasha2012 [34]

<span>To find the exact  calculator experence to find the exact value of a coterminal angle to a given trigonometric angle. Since there are an infinite number of coterminal angles, this calculator finds the one whose size is between 0 and 360 degrees or between 0 and 2π depending on the unit of the given angle.</span>

7 0
3 years ago
Won has a container with the shape below.
blagie [28]

Answer:

B. The shape can be broken into a rectangular prism and a rectangular pyramid.

C. The formula for the volume of this figure is V = B h + one-third B h.

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Step-by-step explanation:

I did the edge test.

3 0
3 years ago
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Please help ! I am bad at math :(
nordsb [41]
The angles ∠ABC and ∠CBE together should equal 180º. 
∠ABC is 155º. 
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Hope this helps!
6 0
3 years ago
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