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GaryK [48]
2 years ago
6

What is 8.54 rounded to the nearest tenth?

Mathematics
2 answers:
SashulF [63]2 years ago
7 0
The answer is 3.50 hope it helped
Vikentia [17]2 years ago
4 0
8.5

Tenths means one decimal place.
"5 and above, give it a shove. 4 and below, let it go."
Because the four rounds it down, the answer is 8.5.

Hope I helped! :) (would you mind giving Brainliest answer? I'm trying to increase my title and I would really appreciate it!)
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Researchers fed mice a specific amount of Toxaphene, a poisonous pesticide, and studied their nervous systems to find out why To
Mkey [24]

Answer:

a. The mean refractory period= 1.85 and the standard error = 0.06455

b.  90% confidence interval for the mean absolute refractory period for all mice when subjected to the same treatment = 1.6981, 2.0019

c. Yes, the data give good evidence to support this theory

Step-by-step explanation:

a.  The table below shows the calculations:

                 X                (X-mean)^2

                1.7             0.0225

                1.8                 0.0025

                1.9                 0.0025

                2.0                 0.0225

Total        7.4                  0.05

Sample size: n=4

The mean is:  \bar{x} = \frac{7.4}{4} = 1.85

The sample standard deviation, s = \sqrt{\frac{\sum \left ( x-\bar{x} \right )^{2}}{n-1}}=0.1291

The standard error, se= \frac{s}{\sqrt{n}}=\frac{0.1291}{2} = 0.06455

b. Degree of freedom: df = n-1 = 3

Critical value of t for 90% confidence interval is: 2.3534

The confidence interval is  \bar{x}\pm t_{c}se = 1.85\pm 2.3534\cdot 0.06455=1.85\pm 0.1519 = (1.6981, 2.0019)

c. The Hypotheses are:

H_{0}:\mu=1.3,H_{1}:\mu>1.3

So the test statistics will be

t=\frac{\bar{x}-\mu}{s/\sqrt{n}}=8.52

The p-value is: 0.0017

We reject the null hypothesis because p-value is less than 0.05 . This indicates that the data gave good evidence to support this theory.

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3 years ago
If Joe drives 186.83 miles on a business trip, and the reimbursement from his company is $13.08. At what rate is Joe's employer
kirill115 [55]

Answer:

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You are looking for a unit rate of cents per mile.

Change the dollar amount to cents, and divide by the number of miles.

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8 0
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nydimaria [60]

Replace x with y and solve for y~

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Hope this helps and leave a brainliest to help me reach expert ;)

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