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2 years ago

The times for running a 5K for a local charity event are Normally distributed, with a mean time of 28 minutes and

Mathematics

2 answers:

aev [14]2 years ago

8 0

Answer:

Answer: D- 37.45

Step-by-step explanation:

I got the answer right, but if you want the math: you find the z-score of 1.75 on the chart, multiply that by the standard deviation to get 9.45, and then add the mean of 28 to get 37.45 minutes

liq [111]2 years ago

7 0

Answer:19.12

I’m not sure if this is the answer but I need the points so here.

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PLZ HELP ME I AM FAILING THIS CLASS WILL GIVE BRAINLIEST THANKYOU!!!!!!

xenn [34]

Answer:

1. 10= 2x + 1.6y

2. 10 - 2x / 1.6 = y

3.10 - 1.6y / 2 = x

Step-by-step explanation:

when rearranging an equation just work backward. like pemdas

3 0

3 years ago

Someone please answer this quickly!<br><br><br>Note: T is the center of the circle.<br><br>

faust18 [17]

Here is my answer. I hope it is helpful.

4 0

3 years ago

A bag of chips is 24 ounces. A serving size is 3/4 ounce. How many servings are in the bag of chips?

marysya [2.9K]

Answer:

The correct answer to the following question will be "32 servings".

Step-by-step explanation:

The given values are,

A bag of chips = 24 ounces

Serving size = 3/4 ounces

Servings = ?

Now,

On dividing "24 ounces" by "3/4 ounce", we get

⇒ $\frac{24}{\frac{3}{4}}$

⇒ $24\times \frac{4}{3}$

⇒ $8\times 4$

⇒ $32$

Thus, the bag of chips contains "32" servings.

4 0

3 years ago

The zebra mussel, Dreissena polymorpha, filters particulate organic carbon (POC) from water

Temka [501]

The number of milligrams per liter of POC were in the bay when the zebra mussels were first introduced is 0.4 milligrams per liter.

The expression is an equation

<h3>What is an equation?</h3>

An equation is a mathematical expression that shows the relationship between two quantities.

<h3>How to find how many milligrams per liter of POC were in the bay when the zebra mussels were first introduced?</h3>

Now, since the concentration, c, of POC (in milligrams per liter) remaining in a particular bay m months after the introduction of a population of zebra mussels can be estimated using the following equation c = 0.4 - 0.9m

Now, to find how many milligrams per liter of POC were in the bay when the zebra mussels were first introduced, this would be the initial value of m at 0 months.

So, substituting m = 0 into the equation, we have

c = 0.4 - 0.9m

c = 0.4 - 0.9(0)

c = 0.4 - 0

c = 0.4 milligrams per liter

So, the number of milligrams per liter of POC were in the bay when the zebra mussels were first introduced is 0.4 milligrams per liter.

Learn more about equation here:

brainly.com/question/25976025

#SPJ1

7 0

2 years ago

Find the value of $B - A$ if the graph of $Ax + By = 3$ passes through the point $(-7,2),$ and is parallel to the graph of $x +

serious [3.7K]

From x + 3y = -5, y = -x/3 - 5, so the slope of the line is -1/3. The slope of the new line is also -1/3, so y = -x/3 + B. Pugging in x = 2 and y = -7, we get -7 = -2/3 + B, so B = -19/3.

Then the line is y = -x/3 - 19/3. Then 3y = -x - 19, so 3y + x = -19. We want the right-hand side to be 3, so we mutiply both sides by -3/19: -9/19*y - 3/19*x = 3. Therefore, A + B = -9/19 - 3/19 = -12/19.

5 0

3 years ago