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3 years ago

Can sum1 help me again? lol ty

Mathematics

2 answers:

san4es73 [151]3 years ago

7 0

Answer:

The answer is A. Im sorry that I didn't do the explanation, i'm very bad at explaining things.

Step-by-step explanation:

Angelina_Jolie [31]3 years ago

6 0

The answer is A because the median is the middle number (4) in an ascending or descending list of numbers and the mean is 3 because if you take the four numbers above 0 you get the total then divide the total by how many numbers there are you get your mean and 15 divided by 5 is 3. Hopefully this helped if not I can explain a little more if you need it!!

You might be interested in

What is the value of the correlation coefficient r of the data set?

vova2212 [387]

The correlation coefficient r of the data set is <em>-0.28</em>

7 0

3 years ago

Suppose after 2500 years an initial amount of 1000 grams of a radioactive substance has decayed to 75 grams. What is the half-li

krok68 [10]

Answer:

The correct answer is:

Between 600 and 700 years (B)

Step-by-step explanation:

At a constant decay rate, the half-life of a radioactive substance is the time taken for the substance to decay to half of its original mass. The formula for radioactive exponential decay is given by:

$A(t) = A_0 e^{(kt)}\\where:\\A(t) = Amount\ left\ at\ time\ (t) = 75\ grams\\A_0 = initial\ amount = 1000\ grams\\k = decay\ constant\\t = time\ of\ decay = 2500\ years$

First, let us calculate the decay constant (k)

$75 = 1000 e^{(k2500)}\\dividing\ both\ sides\ by\ 1000\\0.075 = e^{(2500k)}\\taking\ natural\ logarithm\ of\ both\ sides\\In 0.075 = In (e^{2500k})\\In 0.075 = 2500k\\k = \frac{In0.075}{2500}\\ k = \frac{-2.5903}{2500} \\k = - 0.001036$

Next, let us calculate the half-life as follows:

$\frac{1}{2} A_0 = A_0 e^{(-0.001036t)}\\Dividing\ both\ sides\ by\ A_0\\ \frac{1}{2} = e^{-0.001036t}\\taking\ natural\ logarithm\ of\ both\ sides\\In(0.5) = In (e^{-0.001036t})\\-0.6931 = -0.001036t\\t = \frac{-0.6931}{-0.001036} \\t = 669.02 years\\\therefore t\frac{1}{2} \approx 669\ years$

Therefore the half-life is between 600 and 700 years

5 0

3 years ago

The angle is to be reflected over the line shown. What would be the measure of the reflected angle?

WITCHER [35]

There is nothing here for anyone to work off, If you have a picture or screenshot that would be very nice!

4 0

3 years ago

Read 2 more answers

This season, the probability that the Yankees will win a game is 0.61 and the

zhannawk [14.2K]

The probability that the Yankees will lose when they score fewer than 5 runs is 17.16%.

<h3><u>Probability </u></h3>

Given that this season, the probability that the Yankees will win a game is 0.61 and the probability that the Yankees will score 5 or more runs in a game is 0.56, and the probability that the Yankees win and score 5 or more runs is 0.44, to determine what is the probability that the Yankees will lose when they score fewer than 5 runs the following calculation must be made:

1 - 0.61 = 0.39
1 - 0.56 = 0.44
0.39 x 0.44 = X
0.1716 = X

Therefore, the probability that the Yankees will lose when they score fewer than 5 runs is 17.16%.

Learn more about probability in brainly.com/question/11234923

#SPJ1

6 0

2 years ago

PLEASE HELPPPPP<br> ITS REALY HARDDD

ki77a [65]

Answer: is C

Step-by-step explanation:

because > means open circle but it closed so its not A)

and its not D because the sign is opposite and

b and c both have the correct sign which shows which

direction the line is moving

so the answer is C because it has 4x and ends at 22 these statement are correct

Hope you understand :)

4 0

3 years ago