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marta [7]
3 years ago
15

An Olympic runner completes the 200-meter sprint in 23 seconds. What is the runner’s average speed? (Round your answer to the ne

arest tenth of a meter per second.)
0.9 m/s
1.2 m/s
8.7 m/s
10.1 m/s
Mathematics
2 answers:
gladu [14]3 years ago
8 0

Answer:

8.7 m/s

Step-by-step explanation:

correct on edge 2021

ololo11 [35]3 years ago
6 0

Answer:

C. 8.7 m/s

Step-by-step explanation:

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Which of the following statements about points are false?
vagabundo [1.1K]

Answer:

their sizes vary

Step-by-step explanation:

their sizes vary

4 0
3 years ago
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A patient is given a 50 mg dose of medicine. The medicine's effectiveness decreases every hour at a constant rate of
WITCHER [35]

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f(x) = 50(0.60)x; 18 mg

3 0
3 years ago
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A national survey interviewed 3800 people ages 18 and older nationwide by telephone. One question asked was the amount of gasoli
NeTakaya

Answer:

For this case a parameter represent the population data and for this case the parameter would be the true mean \mu who represent the amount of gasoline they used in the previous week

\bar X= \frac{\sum_{i=1}^n X_i}{3800} =11.75

And the sample mean is an unbiased estimator of the true mean.

Step-by-step explanation:

For this case a parameter represent the population data and for this case the parameter would be the true mean \mu who represent the amount of gasoline they used in the previous week

And in order to estimate the parameter of interest we use a survey of n =3800 and the sample mean who represent an statistic is given by:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

And we got:

\bar X= \frac{\sum_{i=1}^n X_i}{3800} =11.75

And the sample mean is an unbiased estimator of the true mean.

4 0
3 years ago
3 ½ times as many guests arrived as were expected. If 105 guests were unexpected, how many guests were expected ?
lara [203]
Let x be the expected number Number arriving = 3•5 x Unexpected number 2•5 x 2•5 x = 105 10x = 420 x = 42______Option D
8 0
3 years ago
What is the factored form of n2 – 25? (n – 25)(n – 1) (n – 5)(n + 5) (n + 5)(n + 5) (n – 25)(n + 1)
dexar [7]
Hi there!
We are asked to find the correct factored form of n² - 25. Immediately, we can see that 25 has a perfect square root, 5. Now, we can rewrite the expression into n² - 5². Finally, using the difference of squares rule, we can derive the equation (n + 5)(n - 5). Therefore, the answer is (n + 5)(n - 5). Hope this helped!
5 0
3 years ago
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