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ivolga24 [154]
3 years ago
11

A snowmobile travels 32 miles in 2 1/3 hours. To the nearest tenth, what was the average speed of the snowmobile?

Mathematics
1 answer:
wolverine [178]3 years ago
6 0
Average speed in general = total distance / total time.

2 1/3 hours = (7/3) hours

Average speed of snowmobile = 32 miles / (7/3) hours = 13.7 mi/hr
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So it will be y1-y2, so 15-20 is -5

Then x1-x2, so 10-15 is -5.

-5/-5 = 1

There’s ya slope : 1
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Write 107% as a decimal. Pls with solutions
otez555 [7]

Answer:

1.07

Step-by-step explanation:

1 To convert to a decimal, divide the percent number by 100.

<h3>107÷100=1.07</h3>

2 Therefore, the decimal form is 1.07

<h3>1.07</h3>

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Which statement compares the two numbers correctly?
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3 years ago
A simple random sample of size nequals10 is obtained from a population with muequals68 and sigmaequals15. ​(a) What must be true
valentina_108 [34]

Answer:

(a) The distribution of the sample mean (\bar x) is <em>N</em> (68, 4.74²).

(b) The value of P(\bar X is 0.7642.

(c) The value of P(\bar X\geq 69.1) is 0.3670.

Step-by-step explanation:

A random sample of size <em>n</em> = 10 is selected from a population.

Let the population be made up of the random variable <em>X</em>.

The mean and standard deviation of <em>X</em> are:

\mu=68\\\sigma=15

(a)

According to the Central Limit Theorem if we have a population with mean <em>μ</em> and standard deviation <em>σ</em> and we take appropriately huge random samples (<em>n</em> ≥ 30) from the population with replacement, then the distribution of the sample mean will be approximately normally distributed.

Since the sample selected is not large, i.e. <em>n</em> = 10 < 30, for the distribution of the sample mean will be approximately normally distributed, the population from which the sample is selected must be normally distributed.

Then, the mean of the distribution of the sample mean is given by,

\mu_{\bar x}=\mu=68

And the standard deviation of the distribution of the sample mean is given by,

\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}=\frac{15}{\sqrt{10}}=4.74

Thus, the distribution of the sample mean (\bar x) is <em>N</em> (68, 4.74²).

(b)

Compute the value of P(\bar X as follows:

P(\bar X

                    =P(Z

*Use a <em>z</em>-table for the probability.

Thus, the value of P(\bar X is 0.7642.

(c)

Compute the value of P(\bar X\geq 69.1) as follows:

Apply continuity correction as follows:

P(\bar X\geq 69.1)=P(\bar X> 69.1+0.5)

                    =P(\bar X>69.6)

                    =P(\frac{\bar X-\mu_{\bar x}}{\sigma_{\bar x}}>\frac{69.6-68}{4.74})

                    =P(Z>0.34)\\=1-P(Z

Thus, the value of P(\bar X\geq 69.1) is 0.3670.

7 0
3 years ago
Determine the equation of the line with slope 3/4 passing through the point 4,0
Vitek1552 [10]

Answer:

y = \frac{3}{4}x - 3

Step-by-step explanation:

If it has a slope of 3/4, then it will look like this:

y = \frac{3}{4}x + b

If it passes through (4, 0), than y = 0 when x = 4

y = \frac{3}{4}(4) + b

y = 3 + b

b = -3

Therefore, the equation is y = \frac{3}{4}x - 3.

8 0
2 years ago
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