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3 years ago

6.2 x 4.3 + 7.6 simplify

Mathematics

1 answer:

____ [38]3 years ago

4 0

6.2x4.3= 26.66; Add that to 7.6= 34.26; then simplify

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How much money is the sales tax ? I need the answer please

Temka [501]

Answer:

The 3rd one that's what my sis said

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3 years ago

a wall is 8 feet tall and 36 feet wide. tom wants to cover it with white paint that costs 2 dollars per ounce. if each ounce of

arlik [135]

Answer:

1152

Step-by-step explanation:

First we need to find the area of the wall in square inches

8 ft = 8*12 = 96 inch tall

36 ft = 36 * 12 = 432 inches wide

The area = 96 * 432 =41472 in^2

Each ounce of paint cover 72 in^2 so divide by 72

41472/72 =576

We need 576 ounces to cover the wall

At 2 dollars per ounces

576*2 =1152 dollars to paint the wall

8 0

2 years ago

Shannon uses 30 inches of ribbon to make one bow how many feet of ribbon are needed to make 10 bows

coldgirl [10]

First, we need to calculate the amount of ribbon in inches, and then convert it into feet.

Since 30 inches of ribbon is used in one bow, to make 10 bows, we need multiply:

30 x 10 = 300

Now, we need to convert the inches to feet.

300 in = 25 ft

Our answer is 25 ft of ribbon.

Hope this helped!

6 0

3 years ago

Read 2 more answers

My supersonic jet burns 4 gallons of jet fuel in 3 seconds. How many gallons of jet fuel do I need to fly for an hour?

Dahasolnce [82]

60 seconds in a minute, but if you divide 60/3, you’ll get 20. So 20*4=80 gallons/min. If you multiply 80*60=4,800 gallons/hr

7 0

2 years ago

The compressive strength of concrete is normally distributed with mu = 2500 psi and sigma = 50 psi. A random sample of n = 8 spe

Nata [24]

Answer:

$X \sim N(2500,50)$

Where $\mu=2500$ and $\sigma=50$

We select a sample size of n =8. Since the distribution for X is normal then we know that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$SE = \frac{50}{\sqrt{8}}= 17.678 psi$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

Let X the random variable that represent the compressive strength of concrete of a population, and for this case we know the distribution for X is given by:

$X \sim N(2500,50)$

Where $\mu=2500$ and $\sigma=50$

We select a sample size of n =8. Since the distribution for X is normal then we know that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$SE = \frac{50}{\sqrt{8}}= 17.678 psi$

7 0

3 years ago