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Oksi-84 [34.3K]
3 years ago
7

Mental math for 8×25×23

Mathematics
2 answers:
Ilya [14]3 years ago
6 0
8 × 25 × 23 = 4,600

The answer is 4,600.
eimsori [14]3 years ago
5 0
You multiply all the numbers together and your answer should be 4,600
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A cone with radius 2 and height 9 has its radius tripled. How many times greater is the volume of the larger cone than the small
SpyIntel [72]

Answer:

When increasing the radius 3 times the volume increases 9 times and when it is reduced to a third the volume decreases 9 times

Step-by-step explanation:

We have that the formula for the volume of a cone is:

Vc = pi * (r ^ 2) * h

We first calculate the original volume, where the radius is 2 and the height is 9, replacing:

Vc = 3.14 * (2 ^ 2) * 9

Vc = 113.04

Now if the radius is tripled it would be: 2 * 3 = 6, the radius would be 6, replacing:

Vc = 3.14 * (6 ^ 2) * 9

Vc = 1017.36

If we compare:

1017.36 / 113.04 = 9

This means that when the radius is tripled, the volume increases 9 times.

When if re reduces to a third the radius would be: 2/3, replacing:

Vc = 3.14 * ((2/3) ^ 2) * 9

Vc = 12.56

113.04 / 12.56 = 9

Which means that by reducing it to a third the volume becomes 9 times smaller.

6 0
3 years ago
Translate to algebraic expressions
galben [10]
1. x+½
2. 82-x
3. 4(x+3/10)
4. 2x-21
5.2x²
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7 0
3 years ago
What is the percent of change from 75 to 84?
ValentinkaMS [17]

Answer:

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Step-by-step explanation:

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2 years ago
Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 6.4. If 64 people ar
Murrr4er [49]

Answer:

99.38%

Step-by-step explanation:

We have that the mean (m) is equal to 124, the standard deviation (sd) 6.4 and the sample size (n) = 64

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For this, the first thing is to calculate z, which is given by the following equation:

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z = 2.5

With the normal distribution table (attached), we have that at that value, the probability is:

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3 years ago
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Ymorist [56]
The answer would be 1 million because if the average person lives to be 70 multiply that by 2000 and you get 51100000 so I would say that total is closer to 1 million then it is to 3 billion
5 0
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