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3 years ago

8

A school principal is trying to decide how long the breaks should be between periods. He plans to time how long it takes several

students to get from one classroom to another. Name a tool he could use to collect the data.

1 answer:

Andreyy893 years ago

6 0

he could use a bar graph to plot data

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Determine if the following functions are increasing or decreasing, and compare their rates of change. A. Both functions are incr

adoni [48]

Answer:

D is the answer

Step-by-step explanation:

The both are - 2 slopes hope this helps!:)

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3 years ago

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Christina earns $250 a week. To budget money, she pays $135 in bills each week. How much money does Christina have left at the e

Rama09 [41]

Answer:

460 USD

Step-by-step explanation:

monthly earnings = 250 x 4 = 1000

monthly bills = 135 x 4 = 540

end of month = 1000 - 540 = 460 USD

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3 years ago

2x+3y=-6<br><br> what is the slope<br> the x intercept and y intercept ?

melamori03 [73]

Answer:

the slope (or rise over run) is 2/3x, and the y intercept is -2

Step-by-step explanation:

In order to find the slope:

subtract 2x from itself, cancelling it out. Do the same to the other side (-6).
it should then look like this: 3y=-2x+-6
next divide 3 from y as well as from -2 and -6.
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3 years ago

2,000,000 mg = how many kg?

cluponka [151]

$1kg=1,000g\\1g=1,000mg\\\\therefore\\1kg=1,000\times1,000mg=1,000,000mg\to1mg=\frac{1}{1,000,000}kg\\\\2,000,000mg=\frac{2,000,000}{1,000,000}kg=\boxed{2kg}$

8 0

3 years ago

Unknown to a medical researcher, 6 out of 25 patients have a heart problem that will result in death if they receive the test dr

Fiesta28 [93]

Using the hypergeometric distribution, it is found that there is a 0.0002 = 0.02% probability that exactly 6 patients will die.

<h3>What is the hypergeometric distribution formula?</h3>

The formula is:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

The values of the parameters for this problem are:

N = 25, k = 6, n = 8.

The probability that exactly 6 patients will die is P(X = 6), hence:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}$

$P(X = 6) = h(6,25,8,6) = \frac{C_{6,6}C_{19,2}}{C_{25,8}} = 0.0002$

0.0002 = 0.02% probability that exactly 6 patients will die.

More can be learned about the hypergeometric distribution at brainly.com/question/24826394

#SPJ1

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2 years ago