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3 years ago

200 – 4 to the second power + 9 • 10

Mathematics

1 answer:

Vanyuwa [196]3 years ago

8 0

Answer:

1,930 is the answer. Why?

Step-by-step explanation:

200-4^2

200-16= 184

184+9=193

193 times 10= 1,930

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What is greater 32.725 or 32.375?

RUDIKE [14]

32.725 is greater than 32.375

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3 years ago

Results of a survey conducted in 15 large cities within the U.S. finds that the average commute time one way to/from work is 25.

irina1246 [14]

Answer:

We conclude that commute time in her city is less than the amount reported by the survey which is 25.4 minutes.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25.4 minutes

Sample mean, $\bar{x}$ = 22.1 minutes

Sample size, n = 15

Alpha, α = 0.10

Sample standard deviation, s = 5.3 minutes

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 25.4\text{ minutes}\\H_A: \mu < 25.4\text{ minutes}$

We use one-tailed t(left) test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{22.1 - 25.4}{\frac{5.3}{\sqrt{15}} } = -2.411$

Now, $t_{critical} \text{ at 0.10 level of significance, 14 degree of freedom } = -1.345$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

Thus, there is enough evidence to conclude that commute time in her city is less than the amount reported by the survey which is 25.4 minutes.

7 0

4 years ago

I don’t know how to do it

finlep [7]

The circumference of the circle is 34.54. and the area of the square is 49. I hope that is helpful.

8 0

3 years ago

Which translation maps the vertex of the graph of the function f(x) = x2 onto the vertex of the function g(x) = x2 + 2x +1?

LekaFEV [45]

For f(x) to be g(x), the equation f(x) would shift left one

5 0

3 years ago

Read 2 more answers

Hi i need help with this

pogonyaev

Answer:

15 in

Step-by-step explanation:

d^2 = w^2 + l^2

25^2 = 20^2 + l^2

l^2 = 225

l = 15

5 0

2 years ago