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3 years ago

A train is traveling at a constant speed. The diagram represents the train's distance and time. What is the speed of the train?

Mathematics

2 answers:

Over [174]3 years ago

6 0

240÷6=40 so the answer would be "The train is traveling 40 miles per hour."

exis [7]3 years ago

4 0

Answer:

40 miles (Also, I know its imagine math nice try)

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Cholesterol levels for a group of women aged 30-39 follow an approximately normal distribution with mean 190.14 milligrams per d

Anettt [7]

Answer:

Step-by-step explanation:

Hello!

X: Cholesterol level of a woman aged 30-39. (mg/dl)

This variable has an approximately normal distribution with mean μ= 190.14 mg/dl

1. You need to find the corresponding Z-value that corresponds to the top 9.3% of the distribution, i.e. is the value of the standard normal distribution that has above it 0.093 of the distribution and below it is 0.907, symbolically:

P(Z≥z₀)= 0.093

-*or*-

P(Z≤z₀)= 0.907

Since the Z-table shows accumulative probabilities P(Z<Z₁₋α) I'll work with the second expression:

P(Z≤z₀)= 0.907

Now all you have to do is look for the given probability in the body of the table and reach the margins to obtain the corresponding Z value. The first column gives you the integer and first decimal value and the first row gives you the second decimal value:

z₀= 1.323

Using the Z value from 1., the mean Cholesterol level (μ= 190.14 mg/dl) and the Medical guideline that indicates that 9.3% of the women have levels above 240 mg/dl you can clear the standard deviation of the distribution from the Z-formula:

Z= (X- μ)/δ ~N(0;1)

Z= (X- μ)/δ

Z*δ= X- μ

δ=(X- μ)/Z

δ=(240-190.14)/1.323

δ= 37.687 ≅ 37.7 mg/dl

I hope it helps!

8 0

3 years ago

I don’t get this please show your work to see how I do it

Rasek [7]

Answer:

i havent learned this in a while it has been some years from i was in 6 grade so i might get it wrong.

-----------------------------------------------------------------------------------------------------------------

Okay, so basically its trying to say you need to do 1.94k x 340 and you get = 673.18

Step-by-step explanation:

3 0

3 years ago

When you flip a biased coin the probability of getting a tail is 0.34. Find the probability of getting a head.

koban [17]

Answer:

If you want to know what the probability is to get at least one Heads, then that is the same as the probability of all the events (100%, or 1) minus the probability of getting all Tails.

There are 100 coins. 99 are fair, 1 is biased with both sides as heads. With a fair coin, the probability of three heads is 0.53=1/8. The probability of picking the biased coin: P(biased coin)=1/100.

Step-by-step explanation:

5 0

3 years ago

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Find the value of x in the quadrilateral below.

Ket [755]

Answer:

x=66

Step-by-step explanation:

118+106+70+x=360 The total sum of degrees in a quadrilateral is 360.

294+x=360 Add the given angle measures together.

x=66 Subtract 294 from both sides.

8 0

4 years ago

Read 2 more answers

I need an explanation for this pleaseee

Alexxx [7]

Answer:

acute angle

Step-by-step explanation:

it is very simple question because when small terminal us in 10 and big 8ne is on 12 in the 12 hour clock then it is found an acute angle

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3 years ago