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2 years ago

One log is 28 feet 7 inches long, and another is 39 feet 8 inches long. what is the sum of their length

1 answer:

3 0

1 foot is 12 inches

Convert everything to inches:
28 x 12 = 336 in.
39 x 12 = 468 in.

Add all the inches together:
336 + 468 + 7 + 8 = 819 in.

The answer is 819 inches.

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What is the square root of 98/2

timurjin [86]

Answer:

Step-by-step explanation:

$\sqrt{ \frac{98}{2} } = \sqrt{49 } = 7$

I hope it helped you

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2 years ago

Which mathematical property is demonstrated?

Orlov [11]

Commutative property of multiplication is shown above. This is because no matter how you put them, the answer will still be 140.

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2 years ago

A rectangular parking area measuring 5000 ft squared is to be enclosed on three sides using chain-link fencing that costs $5.5

kaheart [24]

Answer:

Dimensions: 75.3778 ft and 66.3325 ft

Minimum price: $1658.31

Step-by-step explanation:

Let's call the length of the parking area 'x', and the width 'y'.

Then, we can write the following equations:

-> Area of the park:

x * y = 5000

-> Price of the fences:

P = 2*x*5.5 + y*5.5 + y*7

P = 11*x + 12.5*y

From the first equation, we have that y = 5000/x

Using this value in the equation for P, we have:

P = 11*x + 12.5*5000/x = 11*x + 62500/x

To find the minimum of this function, we need to take its derivative and then make it equal to zero:

dP/dx = 11 - 62500/x^2 = 0

x^2 = 65000/11

x = 250/sqrt(11) = 75.3778 ft

This is the x value that gives the minimum cost.

Now, finding y and P, we have:

x*y = 5000

y = 5000/75.3778 = 66.3325

P = 11*x + 62500/x = $1658.31

5 0

3 years ago

The table shows the time in

docker41 [41]

30 seconds, half a minute.

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3 years ago

Read 2 more answers

One of the psychologist's findings is that 18 months after the workshop, a sample of 49 job seekers who received training on set

IceJOKER [234]

Answer:

The psychologist finds that the estimated Cohen's d is 0.583.

Step-by-step explanation:

The Cohen's d is used to calculate the effect size, appied when a null hypothesis is rejected.

It can be calculated for this case of population mean as:

$d=\dfrac{M-\mu}{\sigma}=\dfrac{6.5-5.8}{1.2}=\dfrac{0.7}{1.2}=0.583$

The psychologist finds that the estimated Cohen's d is 0.583.

8 0

3 years ago