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3 years ago

How do you write 72% as a fraction and as a decimal?

Mathematics

2 answers:

statuscvo [17]3 years ago

8 0

72% as a decimal is 0.72.

72% as a fraction is 72/100 = 18/25.

Lina20 [59]3 years ago

7 0

Think of 72% as 72.0% and then move the decimal point to the left two spaces (this applies to all percentages) which results in .72, and there you have your answer to the decimal. Then, you can convert the decimal to a fraction by writing .72/1 which is 72/100. Then simplify the fraction (if possible) to get 18/25.

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What is the value of x in the equation of 4x + 1.3 = - 7.9

il63 [147K]

Answer:

x = -2.3

Step-by-step explanation:

4x + 1.3 = -7.9

First we want to combine the like terms.

Subtract 1.3 from both sides.

4x = -9.2

Now we want to isolate x by dividing both sides by 4.

x = -2.3

Check your answer by plugging x back into the original equation.

4x + 1.3 = -7.9

4(-2.3) + 1.3 = -7.9

Multiply.

-9.2 + 1.3 = -7.9

Add.

-7.9 = -7/9

Your answer is correct.

Hope this helps!

6 0

3 years ago

Read 2 more answers

Jose borrowed $20,000 dollars to buy a new speed boat. The interest rate on his loan was 5 percent. He will pay it back in three

Lubov Fominskaja [6]

20,000 * .05 = 1,000 1,000 * 3 = 3,000 20,000 + 3,000 = 23,000 Hope This helps :)

7 0

3 years ago

Pls help me on part B ;

tensa zangetsu [6.8K]

A white an expression that represents the perimeter

Step-by-step explanation:

5 0

3 years ago

Please help

Vesna [10]

Answer:

1. a = 14

2. m = 8

3. N/A

4. m = 2

5. N/A

6. n = 0, $\frac{9}{25}$ , 0.36

7. x = 27

8. x = 65

Step-by-step explanation:

4 0

2 years ago

50 pts!!!! Luciana's laptop has 3,000 pictures. The size of the pictures is skewed to the right, with a mean of 3.7MB and a stan

skelet666 [1.2K]

Answer:

Part A: No, you cannot.

Part B: 0.4491

Explanation:

Part A:

The mean of samples of symmetrical (bell shaped) distributions follow a normal distribution pattern.

Thus, for symmetrical distributions you can use the z-score tables to make calculations that permit calculate probabilities for particular values.

For skewed distributions, in general, the samples do not follow a normal distribution pattern, except that the samples are large.

Since a sample of 20 pictures is not large enough, the answer to this question is negative: you cannot accurately calculate the probability that the mean picture size is more than 3.8MB for an SRS (skewed right sample) of 20 pictures.

Part B.

For large samples, the Central Limit Theorem will let you work with samples from skewed distributions.

Although the distribution of a population is skewed, the Central Limit Theorem states that large samples follow a normal distribution shape.

It is accepted that samples of 30 data is large enough to use the Central Limit Theorem.

Hence, you can use the z-core tables for standard normal distributions to calculate the probabilities for a random sample of 60 pictures instead of 20.

The z-score is calculated with the formula:

z-score = (value - mean/ (standard deviation).

$z=(x-\mu )/\sigma$

Here, mean = 3.7MB, value = 3.8MB, and standard deviation = 0.78MB.

Thus:

$z=(3.7M-3.8MB)/(0.78MB)=-0.128$

Then, you must use the z-score table to find the probability that the z-score is greater than - 0.128.

There are tables that show the cumulative probability in the right end and tables that show the cumulative probability in the left end of a normal standard distribution .

The probability that a z-score is greater than -0.128 is taken directly from a table with the cumulative probability in the left end. It is 0.4491.

4 0

3 years ago