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3 years ago

Two people start walking at the same time in the same direction. One person walks at 8 mph and the other

Mathematics

1 answer:

vekshin13 years ago

4 0

Answer:

<h2> 0.25hours </h2>

Step-by-step explanation:

Data

speed v1=8mph

speed v2=3mph

distance= 1.25

time t=?

speed= distance/time

distance=speed*time

1.25=8*t-3*t

1.25=8t-3t

1.25=5t

t=1.25/5

t=0.25hours

In minutes it is 15min

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Consider a drug testing company that provides a test for marijuana usage. Among 310 tested subjects, results from 28 subjects w

Naily [24]

Answer:

$z=\frac{0.0903 -0.1}{\sqrt{\frac{0.1(1-0.1)}{310}}}=-0.569$

The p value for this case can be calculated with this probability:

$p_v =P(z$

Since the p value is higher than significance level we don't have enough evidence to conclude that the true proportion is significantly less than 0.1

Step-by-step explanation:

Information given

n=310 represent th sample selected

X=28 represent the subjects wrong

$\hat p=\frac{28}{310}=0.0903$ estimated proportion of subjects wrong

$p_o=0.1$ is the value to verify

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value

System of hypothesis

We want to test the claim that less than 10 percent of the test results are wrong ,and the hypothesis are:

Null hypothesis: $p\geq 0.1$

Alternative hypothesis: $p < 0.1$

The statistic is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing the info we got:

$z=\frac{0.0903 -0.1}{\sqrt{\frac{0.1(1-0.1)}{310}}}=-0.569$

The p value for this case can be calculated with this probability:

$p_v =P(z$

Since the p value is higher than significance level we don't have enough evidence to conclude that the true proportion is significantly less than 0.1

5 0

4 years ago

Complete the net worth statement by determining the total assets and total liabilities. What is the net worth?

masha68 [24]

The net worth, based on the net worth statement of total assets and total liabilities, is <u>B) $2,000</u>.

<h3>What is the net worth?</h3>

The net worth of an individual is the difference between the assets owned and the liabilities that the person owes.

<h3>Data and Calculations:</h3><h3>Assets:</h3>

Cash $200

Checking accounts $1,000

Savings account $400

Cars $8,000

Furniture and appliances $1,500

Computers $900

Stereo/Cell phones $400

Clothing $300

Total assets = $12,700

<h3>Liabilities:</h3>

Credit card balances $1,200

Charge accounts balances of $200

Student loans $7,000

Car Loans $2,300

Total liabilities = $10,700

Net worth = $2,000 ($12,700 - $10,700)

<h3>Answer Options:</h3>

A) $200

B) $2,000

C) $10,700

D) $12,700

Thus, the net worth, based on the net worth statement of total assets and total liabilities, is <u>B) $2,000</u>.

Learn more about the net worth of an individual at brainly.com/question/12371230

6 0

3 years ago

A box (with no top) is to be constructed from a piece of cardboard of sides a and b by cutting out squares of length h from the

Drupady [299]

<span>h = (19 - sqrt(97))/6, which is approximately 1.525190366 The volume of the box will be V = lwh And l will be a - 2h And w will be b - 2h So using the above, the volume of the box will be V = lwh V = (a - 2h)(b - 2h)h V = (11 - 2h)(8 - 2h)h V = (88 - 22h -16h + 4h^2)h V = (88 - 38h + 4h^2)h V = 88h - 38h^2 + 4h^3 Since you're looking for a maximum, that screams "First derivative" So let's calculate the first derivative of the function and solve for 0. V = 88h^1 - 38h^2 + 4h^3 V' = 1*88h^(1-1) - 2*38h^(2-1) + 3*4h^(3-1) V' = 1*88h^0 - 2*38h^1 + 3*4h^2 V' = 88 - 76h + 12h^2 We now have a quadratic equation. So using the quadratic formula with A=12, B=-76, and C=88, calculate the roots as: (19 +/- sqrt(97))/6 which is approximately 1.525190366 and 4.808142967 We can ignore the 4.808142967 value since although it does indicate a slope of 0, it produces a negative width and is actually a local minimum of the volume function. So the optimal value of h is (19 - sqrt(97))/6, which is approximately 1.525190366</span>

5 0

4 years ago

The coefficient of 2(3)(6)Q is _____.

salantis [7]

Your answer would be 36

3 0

3 years ago

Read 2 more answers

PICTURE) Could someone please correct my answer and explain 6 for me marking brainliest

Gnesinka [82]

Answer:

For number 5, it is D

For number 6, it is A

Step-by-step explanation:

For number 5, we have the dimensions options here.

We first need to check to see if all the choices give the perimeter of 34, as sometimes there are trick answers.

We know the 34 is the perimeter because we are looking for area, so we add the two given numbers and double it to find the perimeter since we have the length and width.

*(Formula for perimeter is 2(L + W) )

(I already checked them all, and they all give to be 34 so they are all safe.)

Then we find the areas of each.

*(Formula for area is L * W {the " * " symbol represents multiplication.)

We multiply 12 by 5 to get 60.

We multiply 13 by 4 to get 52.

We multiply 10 by 7 to get 70.

We multiply 9 by 8 to get 72.

Since we are looking for the greatest area, we look for the greatest number, which is the 72.

Therefore the 9 by 8 option, or D is correct.

For number 6, we are looking for the minimum perimeter and we have the area, so we set the same thing up except modified slightly.

We first check if all the areas are 64 to look for a trick answer.

We multiply 8 by 8 to get 64.

We multiply 1 by 64 to get 64.

We multiply 6 by 6 to get 36. (WHAT?!!?!! omg me big brain lolza. {nah jk})

We multiply 32 by 2 to get 64.

So we know the 6 by 6 option or C is wrong.

Then we look for the perimeters of the dimension solutions.

(This will skip C so it will go A, B, and then D, since we know C is incorrect and is unrelated now.)

2 ( 8 + 8 ) = 32

2 ( 1 + 64 ) = 130

2 ( 32 + 2 ) = 68.

Since we are looking for the smallest perimeter, it is the smallest answer this time.

So it must be A, since 32 is the smallest.

Hope this helps!

4 0

3 years ago