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3 years ago

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Light travels at 186,282 miles per second,and the sun is 93 million miles from the earth.How many seconds does it take for the l

ight to reach the earth

2 answers:

Virty [35]3 years ago

7 0

Want it exact? Here it is:499.243083(got it from my calculator), if rounded, then here it is:500

marusya05 [52]3 years ago

5 0

Hello! So to find the number of seconds it take for light to reach Earth, all you have to do is divide the distance from earn by the distance light travels per second. 93,000,000/186,282 is 499.2430831 or 499.25 seconds when rounded to the nearest hundredth. It takes about 499.25 seconds for light to reach the Earth.

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Tanya [424]

Answer:

$2.50$

Step-by-step explanation:

Given

$(x_1,y_1) = (-1,0.8)$

$(x_2,y_2) = (0,2)$

$(x_3,y_3) = (1,5)$

$(x_4,y_4) = (2,12.5)$

Required

The rate of change (b)

The above graph is represented as:

$y = ab^x$

For: $(x_2,y_2) = (0,2)$ ;

We have:

$y = ab^x$

$2 = a * b^0$

$2 = a *1$

$2 = a$

$a = 2$

For $(x_3,y_3) = (1,5)$ ,

We have:

$y = ab^x$

$5 = a * b^1$

$5 = a * b$

Substitute $a = 2$

$5 = 2 * b$

Divide by 2

$2.5 = b$

$b = 2.5$

<em>Hence, the rate of change is 2.50</em>

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3 years ago

konstantin123 [22]

Answer:

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Step-by-step explanation:

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3 years ago

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An integer between 4.5 and 5.5

Brums [2.3K]

Answer: 5

Step-by-step explanation:

the only whole number between them is 5 <3

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Simora [160]

Answer:

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Step-by-step explanation:

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3 years ago

Michmoo Computer Company sells computers and computer parts by mail. The company assures its customers that products are mailed

Anastaziya [24]

Answer: (60.858, 69.142)

Step-by-step explanation:

The formula to find the confidence interval for mean :

$\overline{x}\pm z_c\dfrac{\sigma}{\sqrt{n}}$ , where $\overline{x}$ is the sample mean , $\sigma$ is the population standard deviation , n is the sample size and $z_c$ is the two-tailed test value for z.

Let x represents the time taken to mail products for all orders received at the office of this company.

As per given , we have

Confidence level : 95%

n= 62

sample mean : $\overline{x}=65$ hours

Population standard deviation : $\sigma=18$ hours

z-value for 93% confidence interval: $z_c=1.8119$ [using z-value table]

Now, 93% confidence the mean time taken to mail products for all orders received at the office of this company :-

$65\pm (1.8119)\dfrac{18}{\sqrt{62}}\\\\ 65\pm4.142\\\\=(65-4.142,\ 65+4.142)\\\\= (60.858,\ 69.142)$

Thus , 93% confidence the mean time taken to mail products for all orders received at the office of this company : (60.858, 69.142)

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3 years ago