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3 years ago

Please help I suck at math and this is for a grade

Mathematics

2 answers:

qwelly [4]3 years ago

6 0

C. negative exponents always go at the bottom

Alexandra [31]3 years ago

4 0

The answer is A. If you divide by 2 negatives you get a positive 2 to the second power.

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Which is true of African American soldiers in the Civil War?

yarga [219]

Answer:

the answer is c)

Step-by-step explanation:

5 0

3 years ago

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A novel is 11/16 inch thick. If there are two shelves, each 99 inches wide, how many novels will be able to fit on the two shelv

34kurt

First let's just combine the shelves to make it easier. 99 + 99 = 198.

We can simply divide 198 by 11/16 to get the answer. First let's convert 11/16 to a decimal.

11 divided by 16 is 0.6875

So 198 divided by 0.6875 is 288.

288 novels can fit on both the shelves.

8 0

3 years ago

Simplify the expressions.<br><br> i32 = <br><br> i25 = <br><br> i86 = <br><br> i51 =

maw [93]

Simplify the expression using the definition of an imaginary number i = sqrt -1

i32 = 1

i25 = i

i86 = -1

i51 = -i

3 0

3 years ago

A data set includes 108 body temperatures of healthy adult humans having a mean of 98.3degrees°F and a standard deviation of 0.6

mylen [45]

<h2>Answer with explanation:</h2>

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n=106

Sample mean : $\overline{x}=98.3^{\circ}\ F$

Standard deviation : $\sigma= 0.69^{\circ}F$

Significance level : $\alpha: 1-0.99=0.01$

Critical value : $z_{\alpha/2}=2.576$

Then , 99% confidence interval estimate of the mean body temperature of all healthy humans will be :-

$98.3\pm (2.576)\dfrac{0.69}{\sqrt{106}}\\\\\approx98.3\pm0.173=(98.3-0.173,\ 98.3+0.173)=(98.127,\ 98.473)$

Since 98.6 is higher than the upper limit of the confidence interval (98.473), then this suggest that the mean body temperature could be lower then 98.6 degrees.

The best estimate of population mean is always the sample mean. $\mu=\overline{x}=98.3^{\circ}\ F$

7 0

3 years ago

What does -43 plus 17 equal?

Feliz [49]

-43 plus 17 equals -26. Hope this helps.

8 0

4 years ago

Read 2 more answers