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2 years ago

Find the product of 20 x 9 x 5. Tell which property you use?

Mathematics

1 answer:

zavuch27 [327]2 years ago

4 0

The answer to 20 x 9 x 5 is 900. You use multiplication property.

Hope this helps! :)

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A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level

cupoosta [38]

Answer:

The sample required is $n = 135$

Step-by-step explanation:

From the question we are told that

The standard deviation is $\sigma = 9$

The margin of error is $E = 2$

Given that the confidence level is 99% then the level of significance is mathematically evaluated as

$\alpha = 100-99$

$\alpha = 1 \%$

$\alpha = 0.01$

Next we will obtain the critical value $\frac{\alpha }{2}$ from the normal distribution table(reference math dot armstrong dot edu) , the value is

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 2.58$

The sample size is mathematically represented as

$n = [ \frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ]^2$

substituting values

$n = [ \frac{ 2.58 * 9 }{2} ]^2$

$n = 135$

3 0

2 years ago

Write 25 % as a fraction

skad [1K]

Answer:

1 / 4

hope this helps (✿◡‿◡)

7 0

2 years ago

Read 2 more answers

Edward pattie Mitch were each simplifying the same exponential equation the work is shown below determine who has simplify the e

Lana71 [14]

Answer:x^6/4

Step-by-step explanation:

Simplifying the steps

8 0

3 years ago

A trader had 30,500 eggs . He sold 12,680 of them to John and 16,570 to Peter. How many eggs he had left

zlopas [31]

Answer:

C. 17,820

Step-by-step explanation:

30,500-12,680= 17,820

4 0

2 years ago

What is the product of 73 and 4.4 x 10^6 expressed in scientific notation?

Dima020 [189]

Answer: 7.3 x 10^1 & 4400000.

Step-by-step explanation: Count the place holders and just add zeros to the exponential amount.

7 0

3 years ago