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3 years ago

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Mathematics

1 answer:

yanalaym [24]3 years ago

5 0

Answer:

10 ways

Step-by-step explanation:

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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

3 years ago

-7(a - 3) = 11 - 7a<br> what’s the answer

natali 33 [55]

Answer:

the statement is false there is no solution

Step-by-step explanation:

step 1 -7(a-3)=11-7a

step 2 -7a+21=11-7a

step 3 cancel out the -7a's

step 4 you are left with 21=11 which does not work so it is false

8 0

3 years ago

Please help me with my problem

Doss [256]

D and F are not equivalent to ax+bx+ac+bc+

8 0

3 years ago

Work out the value of 2x2 x-1=2

Otrada [13]

Answer:

rong answer is 18

I think the right answer is 0.75

Step-by-step explanation:

6 0

3 years ago

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Next Question!

rodikova [14]

Answer:

1/6≈0.17≈17%

Step-by-step explanation:

6 0

3 years ago

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