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2 years ago

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suppose a computer virus begins by infecting 8 computers in the first hour after it is released .Each hour after that each newly

infected computer causes 8 more computer to become infected.the function Y=8x models this situation. make a table with integer values of X from 1to4 in the space below

1 answer:

Nonamiya [84]2 years ago

7 0

Answer: (the function is 8^X, not 8X.)

Step-by-step explanation:

X = 1 8^X = 8

X = 2 8^X = 64

X = 3 8^X = 512

X = 4 8^X = 4096

You might be interested in

What's an equivalent expression to 4(c+9)

sineoko [7]

4c + 36 because you have to multiple 4 x c which is 4c and then you have to multiply 4 by 9 which gives 4c + 36 (hope this helps)

6 0

2 years ago

A researcher wishes to estimate the average blood alcohol concentration (BAC) for drivers involved in fatal accidents who are f

Mnenie [13.5K]

Answer:

A 90% confidence interval for the mean BAC in fatal crashes in which the driver had a positive BAC is [0.143, 0.177] .

Step-by-step explanation:

We are given that a researcher randomly selects records from 60 such drivers in 2009 and determines the sample mean BAC to be 0.16 g/dL with a standard deviation of 0.080 g/dL.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean BAC = 0.16 g/dL

s = sample standard deviation = 0.080 g/dL

n = sample of drivers = 60

$\mu$ = population mean BAC in fatal crashes

<em>Here for constructing a 90% confidence interval we have used a One-sample t-test statistics because we don't know about population standard deviation. </em>

So, a 90% confidence interval for the population mean, $\mu$ is;

P(-1.672 < $t_5_9$ < 1.672) = 0.90 {As the critical value of t at 59 degrees of

freedom are -1.672 & 1.672 with P = 5%} P(-1.672 < $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ < 1.672) = 0.90

P( $-1.672 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X-\mu}$ < $1.672 \times {\frac{s}{\sqrt{n} } }$ ) = 0.90

P( $\bar X-1.672 \times {\frac{s}{\sqrt{n} } }$ < $\mu$ < $\bar X+1.672 \times {\frac{s}{\sqrt{n} } }$ ) = 0.90

<u>90% confidence interval for</u> $\mu$ = [ $\bar X-1.672 \times {\frac{s}{\sqrt{n} } }$ , $\bar X+1.672 \times {\frac{s}{\sqrt{n} } }$ ]

= [ $0.16-1.672 \times {\frac{0.08}{\sqrt{60} } }$ , $0.16+1.672 \times {\frac{0.08}{\sqrt{60} } }$ ]

= [0.143, 0.177]

Therefore, a 90% confidence interval for the mean BAC in fatal crashes in which the driver had a positive BAC is [0.143, 0.177] .

7 0

2 years ago

Which property of real numbers is illustrated by the equation 52+(27+35= (52+27) +36?

Wittaler [7]

The answer is b associative property

6 0

1 year ago

kirill115 [55]

we have

$y=-16t^{2} +120$

we know that

When the apple hit the ground the value of y is equal to zero

so

Find the x-intercept of the function

equate the function to zero

$-16t^{2} +120=0$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$-16t^{2} =-120$

$t^{2} =-120/-16$

$t^{2} =7.5$

$t=(+/-)\sqrt{7.5}$

$t=(+/-)2.74$

therefore

<u>the answer is</u>

$2.74\ sec$

using a graphing tool

see the attached figure to better understand the problem

7 0

2 years ago

1+ [2+x] =9<br><br> A. X=7 or x = -11<br> B. X=5 or x= -9<br> C. X=4 or x= -8<br> D. X=6 or x= -10

Vikentia [17]

D is the correct answer, first you have to write to you equations 1+ the absolute value of 2+ X equals nine and 1+ the absolute value of 2+ X equals -9 then you must subtract one from both sides

3 0

2 years ago

Read 2 more answers