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KATRIN_1 [288]
3 years ago
5

PPPLEEASSSEREE Add. What is the sum (2 x 10") + (7 x 101 ) in scientific notation?

Mathematics
1 answer:
pantera1 [17]3 years ago
6 0

Answer:

Simplify the expression? Is it:   2 x 10 '' + 707 x   ....?

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T/5=2.9
iVinArrow [24]

Answer:

multiply by 5

Step-by-step explanation:

in order to get t by itself, you must do the incerverse operation of division, which is multiplication

5(t/5)=5(2.9)

the 5 crosses out and you get

t=14.5

4 0
2 years ago
Read 2 more answers
In a college student poll, it is of interest to estimate the proportion p of students in favor of changing from a quarter-system
Contact [7]

Answer:

n=206

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

t_{\alpha/2}=-2.58, t_{1-\alpha/2}=2.58

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.09, we can use as prior estimate of p 0.5, since we don't have any other info provided, and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.09}{2.58})^2}=205.44  

And rounded up we have that n=206

3 0
3 years ago
What is this number written in standard form 3×1,000,00+3×100,00+2×100
pav-90 [236]
3(1,000,000)=3,000,000
3(100,000)=300,000
2(100)=200
3,300,200
6 0
3 years ago
Read 2 more answers
Joan says that the expression
Gemiola [76]

Answer:

Yes, Joan is correct

Explanation

3 0
3 years ago
i have to write equations in standard form using integer coefficients for A,B, and, C Example: y= -8/15x + 1/20
uysha [10]

Answer:

c

Step-by-step explanation:

5 0
3 years ago
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