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Volgvan
3 years ago
10

Simplify: (-20)4 ÷ (-20)1 A.(-20)4 B. (-20)5 C. -201 D.(-20)3

Mathematics
2 answers:
attashe74 [19]3 years ago
4 0

Answer:

(-20)4

Step-by-step explanation:

Bezzdna [24]3 years ago
3 0
A. (-20)4
Hope this helped! With love, Eilyssa! :)
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Solve for 'p'
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\left(\dfrac{9a^{-4}}{25}\right)^p=\dfrac3{5a^2}
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One way to find p is to notice that the part on the left hand side within the parentheses can be written as a square:

\dfrac9{25a^4}=\dfrac{3^2}{5^2(a^2)^2}=\left(\dfrac3{5a^2}\right)^2

So you could write

\left(\left(\dfrac3{5a^2}\right)^2\right)^p=\left(\dfrac3{5a^2}\right)^{2p}=\dfrac3{5a^2}

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3 years ago
Solve the equation below. 2.3=p+0.6p=
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Step-by-step explanation:

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2 years ago
In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known to be appro
pantera1 [17]
The z score for a confidence level of 99% is 2.575.. You need to know this to complete this type of problem.. the other two commonly used confidence levels are 90% and 95% having z scores of 1.645 and 1.96 respectively. You need to memorize this!

To find the confidence interval, it will be defined as the sample mean plus/minus the margin of error.. Now to find the margin of error, divide the standard deviation of 12 by the square root of the number of elements in your sample(√250). Then take that result and multiply it by the Z score I mentioned above for a 99% confidence level.


In this case: the sample mean is 70 and the margin of error is approximately 1.95

So to calculate the confidence interval, do the following:
70 - 1.95 = 68.05 rounded to the nearest whole number is 68
70 + 1.95 = 71.95 rounded to the nearest whole number is 72

Looks like that would be the last choice. hope this helps.. it's been awhile since my work with statistics :-)
4 0
3 years ago
Read 2 more answers
Find the product and show your work 34,879 x 10 =
creativ13 [48]

Answer:

34,879 × 10 = 348,790

Step-by-step explanation:

The answer is <em>348,790</em><em> </em>because 34,879 multipled by 10 is <em>348,790</em><em> </em>as shown in the picture above ^^

7 0
3 years ago
Read 2 more answers
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