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SVEN [57.7K]
3 years ago
9

It takes about 14 person-hours of labor to break up a driveway and clear away the rubble. It takes about 8 person-hours of labor

to pour and smooth concrete for the new driveway.
Mathematics
1 answer:
MAVERICK [17]3 years ago
8 0

Answer: 22 person-hours

Step-by-step explanation:

It takes 14 hours to break up the driveway and then to clear away the rubble.

Then it takes 8 hours to pour the concrete and smooth it.

Total time it will take to break up a driveway, clear away the rubble, pour the concrete, and smooth the concrete will therefore be;

= 14 + 8

= 22 person-hours

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Answer:

-10, -1, 5

Step-by-step explanation:

To find the zeros of a function, you have to set each factor to zero in equations, then solve for x ....

x + 10 = 0 ... then factor 10 over (subtract 10 from each side) ...

x = -10

x-5=0

then repeat (add 5 to both sides) (and subtract 1 from both sides) ...

x -5 = 0 to x = 5

x + 1 = 0 to x = -1

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3 years ago
What single decimal multiplier would you use to increase by 10% followed by a 16% decrease?
Neko [114]
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7 0
2 years ago
The side lengths of the base of this right triangular prism are 3 ft, 4 ft, and 5 ft. The height of the prism is 9 ft. What is t
Sladkaya [172]

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Step-by-step explanation:

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2 years ago
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7 0
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Read 2 more answers
In Nebraska, the mean rain-fed corn yield of harvested fields are normally
NikAS [45]

Answer: 169.2 per acre are produced if a field is in the top 25%.

Step-by-step explanation:

Given:  The mean rain-fed corn yield of harvested fields are normally  distributed, produce 147.2 bushels per acre with a standard deviation of 33 bushels per acre.

Let X denote the mean rain-fed corn yield of harvested fields.

Let x denotes the number of bushels per acre are produced if a field is in the top 25%.

Top 25% on a density curve means , (100-25%)i.e. 75% area lies below x.

I.e.

P(X.

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