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Molodets [167]
3 years ago
11

How do you solve this. Plz help

Mathematics
1 answer:
BartSMP [9]3 years ago
3 0
It should be 2.75 idk why it is not an option
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1.6x 10^5 in standard notation.
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The answer is 160,000. Since it's positive,move the decimal point 5 times to the right. 




ANSWER: 160,000
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What is the common ratio for the sequence:<br> 28, -14, 7, -3.5...
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2 years ago
Body armor provides critical protection for law enforcement personnel, but it does affect balance and mobility. The article "Imp
yKpoI14uk [10]

Answer:

No, there is not enough evidence to support the claim that true average task time with armor is less than 2 seconds.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that true average task time with armor is less than 2 seconds.

Then, the null and alternative hypothesis are:

H_0: \mu=2\\\\H_a:\mu< 2

The significance level is 0.01.

The sample has a size n=52.

The sample mean is M=1.95.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=0.2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{0.2}{\sqrt{52}}=0.028

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{1.95-2}{0.028}=\dfrac{-0.05}{0.028}=-1.803

The degrees of freedom for this sample size are:

df=n-1=52-1=51

This test is a left-tailed test, with 51 degrees of freedom and t=-1.803, so the P-value for this test is calculated as (using a t-table):

P-value=P(t

As the P-value (0.039) is bigger than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that true average task time with armor is less than 2 seconds.

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Answer:

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Step-by-step explanation:

combine like terms. 12x and 5x go together to make 17x. 4 and -16 go together to make -12

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What is the preimeter of a haxagon that has equal sides of 12 inches?
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72 inches because a hexagon has 6 sides so you multiply 6 × 12

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3 years ago
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