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jasenka [17]
3 years ago
14

Need help with 10 and 11

Mathematics
1 answer:
never [62]3 years ago
7 0
I know that the answer for number 10 is the first option
You might be interested in
Solve or answer the item
Arturiano [62]
The answer is 148. the proportion is already set up, so all you have to do is to cross multiply and divide.

259         7              7x       1036
------ =  -----  =     ------- =  --------- =  148
  k           4              7            7

(Hope this helps)

7 0
3 years ago
Please help me find the measure of the arc or angle indicated. (Angles on circles)
nata0808 [166]

Answer: 9. 54; 10. 220; 11. 71; 12. 262

Step-by-step explanation: Chord and tangent intersection angle is half the arc measure or circle, and inscribed angles are also half the included arc measure

5 0
3 years ago
you accidentally dropped a coin from the top of 10 stairs. what is the probability that it will land on the 4th step facing up
Roman55 [17]

Answer:

Step-by-step explanation:

1/10 * 1/4 = 1/14

1/2 because there is a 50/50% chance its either heads or tails

3 0
4 years ago
Find the circumference of the circle.<br> 7 m
Serggg [28]

Answer:

2πr

Step-by-step explanation:

8 0
3 years ago
A random sample of 56 lithium batteries has a mean life of 645 hours with a population standard deviation of 31 hours. Compute t
bearhunter [10]

Answer: A. ​(636.9, 653.1)

Step-by-step explanation:

Given : Sample size : n=56

Significance level :\alpha: 1-0.95=0.05

Critical value :z_{0.05}=1.96

Sample mean : \overline{x}=645\text{ hours}

Standard deviation : \sigma= 31\text{ hours}

The 95% confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm (1.96)\dfrac{31}{\sqrt{56}}\\\\=645\pm8.1\\\\=(636.9, 653.1)

Hence,  95% confidence interval for population mean is (636.9, 653.1).

8 0
3 years ago
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