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2 years ago

5

The number of bacteria in a Petri dish increases by 18% every hour. If there were initially 200 bacteria placed in the Petri dis

h, which function can be used to determine the number of bacteria in the Petri dish in exactly x hours?

1 answer:

Fudgin [204]2 years ago

7 0

Answer:

y=36x, I think would be the correct answer

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We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando

coldgirl [10]

Answer: $(9.27025,\ 11.12975)$

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : $\overline{x}=10.2$

sample standard deviation : $s= 1.5$

Significance level ; $\alpha= 1-0.90=0.10$

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = $t_{\alpha/2, df}=t_{0.05 , 8}=1.8595$

Confidence interval for the population mean :

$\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

90% confidence interval for the mean value will be :

$10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}$

$10.2\pm (1.8595)\dfrac{1.5}{3}$

$10.2\pm (1.8595)(0.5)$

$10.2\pm (0.92975)$

$(10.2-0.92975,\ 10.2+0.92975)$

$(9.27025,\ 11.12975)$

Hence, the 90% confidence interval for the mean value= $(9.27025,\ 11.12975)$

6 0

2 years ago

Please help! Will give brainliest to correct answer

Lana71 [14]

Answer:

A = (5,3)

B = Begin at origin, move 3 units in a positive direction along the x-axis, move 4 units in a positive direction parallel to the y-axis

C = (4.5, 6)

D = Begin at origin, Move 0 units along the x-axis, Move 4.5 units in positive direction parallel to the y-axis

Step-by-step explanation:

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Solve the equation for w<br> 7w + 18 = 10w + 24

DochEvi [55]

Answer:

The answer is -2.

Step-by-step explanation:

7w + 18 = 10w + 24

7w = 10w + 6

-3w = 6

w = -2

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9^a-5 = 12<br><br> pls answer

xenn [34]

Answer:

a=1.29 approx

Step-by-step explanation:

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2 years ago

A slice is made perpendicular to the base of a right rectangular prism as shown. What is the area of the resulting two-dimension

Yuki888 [10]

Answer:

225 i think

Step-by-step explanation:

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