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3 years ago

14

Karen read 20 pages of her book in a half hour. If she reads for 3 hours at the same rate , about how many pages of her book can

Karen read?

2 answers:

Anarel [89]3 years ago

6 0

Karen can read 120 pages in three hours

Sindrei [870]3 years ago

3 0

If Karen reads for 3 hours at 20 pages per half hour (40 pages per hour). She will have read 120 pages within 3 hours

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There are 26 gold fish in the tank at the store. how many ways can ben choose 5?

Lapatulllka [165]

Answer:

5

Step-by-step explanation:

26/5= 5.2

the greatest whole number that can be chosen is 5.

6 0

2 years ago

b. Find a 99% confidence interval for mean age of ICU patients using the facts that, in the sample, the mean is 57.55 years and

rjkz [21]

Answer:

<em>99% of confidence intervals for mean age of ICU patients</em>

<em>(53.8920 , 61.2079)</em>

Step-by-step explanation:

<u><em>Explanation</em></u>:-

<em>Given sample mean </em> $x^{-} = 57.55$ <em></em>

Given standard error is determined by

S.E = $\frac{S.D}{\sqrt{n} }$

<em>Given data standard error = 1.42</em>

<em>99% of confidence intervals for mean is determined by</em>

$(x^{-} - Z_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.01} \frac{S.D}{\sqrt{n} } )$

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.05} = 2.576$

$(x^{-} - 2.576 S.E , x^{-} + 2.576 S.E)$

$(57.55 - 2.576X 1.42 , 57.55+ 2.576 X1.42)$

(53.8920 , 61.2079)

<u><em>Conclusion</em></u>:-

<em>99% of confidence intervals for mean is determined by</em>

<em>(53.8920 , 61.2079)</em>

5 0

3 years ago

The school hiking club has completed 4 out of 5 hikes so far this year. They have hiked 4.6 miles, 3.7 miles, 5.1 miles, and 2.9

dezoksy [38]

Answer:

3.7 Miles

Step-by-step explanation:

Add all of the miles, then subtract it by 20.

3 0

3 years ago

Ryan was traveling by car at an average speed of 40.3 miles per hour.

Ratling [72]

Answer:

your answer is 8

Step-by-step explanation:

If you divide 322.4 by the speed 40.3 you would get 8 the amount of hours traveling the given distance.

If you dont think the answer is correct you can simply mutiply 40.3 by 8 to ensure that 322.4 miles is in fact how far you will go in that time

hope this help. Have a good day!

\

Bye

6 0

3 years ago

If 2x+20 and 3x+20 makes a straight angke find value of x

erma4kov [3.2K]

Answer:

x = 28

Step-by-step explanation:

The sum of the angles in a straight angle = 180°

Sum the angles and equate to 180

2x + 20 + 3x + 20 = 180

5x + 40 = 180 ( subtract 40 from both sides )

5x = 140 ( divide both sides by 5 )

x = 28

3 0

3 years ago