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3 years ago

What is (9.3x10^34)/(3.1x10^17) in scientific notation?

Mathematics

2 answers:

Maksim231197 [3]3 years ago

8 0

9.3*10^34 divided by 3.1*10^17 is 3*10^17 in scientific notation :)

stiks02 [169]3 years ago

5 0

Answer:

3 x 10^17

Step-by-step explanation:

Move the decimal to the left of the decimal point and the number of of decimal places you will move will be the xponent 10. The sign of the exponent will depend the direction you are moving the decimal.

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3 years ago

A sample of 15 commuters in Chicago showed the average of the commuting times was 33.2 minutes. If s = 8.3 minutes, find the 95%

OleMash [197]

Answer:

The 95% confidence interval of the true mean.

(29.4261 ,36.9739)

Step-by-step explanation:

Step :- (i)

Given sample size 'n' =15

sample of the mean x⁻ = 33.2

The standard deviation of the sample 'S' = 8.3

95% of confidence intervals

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } ,x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$

Step:-(ii)

The degrees of freedom γ=n-1 = 15-1=14

The tabulated value t = 1.761 at 0.05 level of significance.

now substitute all possible values, we get

$(33.2 - 1.761\frac{8.3}{\sqrt{15} } ,33.2+ 1.761\frac{8}{\sqrt{15} } )$

After calculation , we get

(33.2-3.7739 , 33.2+3.7739

(29.4261 ,36.9739)

Conclusion:-

the 95% confidence interval of the true mean.

(29.4261 ,36.9739)

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3 years ago

Find the coordinates of the vertex of the following parabola algebraically. Write your answer as an (x , y) point

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Answer:

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Step-by-step explanation:

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