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3 years ago

You are a landscaper and need to mulch 15 yards of plant beds. You have 20 bags of mulch and each bag covers 3 feet.

Mathematics

2 answers:

Umnica [9.8K]3 years ago

5 0

Whats the question?

You'll need 15 bags to cover 15 yards
1 bag/ 3 feet
3 feet/ 1 yard

15 bags = 45 feet = 15 yards

fomenos3 years ago

5 0

You have 20 yards of mulch because each bag covers one yard. Remember that there are three feet in one yard. (3 ft. = 1 yd.) If each bag covers three feet then each bag covers one yard of plant bed. If you have 20 bags and each contains one yard of mulch, then you would have plenty of mulch to cover all of the plant beds. You would even have 5 yards or 5 bags of mulch left over.

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Help me w this multiple choice!

olga2289 [7]

Answer:

Step-by-step explanation:

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$\cos(30) = \frac{m}{ \frac{10 \sqrt{3} }{3} } \\ 0.866 = \frac{m}{5.77} \\ m = 5$

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3 years ago

A manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding ma

IrinaVladis [17]

Answer:

538 books should be tested.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?

n books should be tested.

n is found when $M = 0.08$

We have that $\sigma = 0.72$

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$0.08 = 2.575*\frac{0.72}{\sqrt{n}}$

$0.08\sqrt{n} = 2.575*0.72$

$\sqrt{n} = \frac{2.575*0.72}{0.08}$

$(\sqrt{n})^{2} = (\frac{2.575*0.72}{0.08})^{2}$

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Rounding up

538 books should be tested.

6 0

3 years ago

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zzz [600]

Answer:

B. $\frac{6}{2x^{2} - 5x}$

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The product of the ratioal expressions given above can be found as follows:

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Multiply the denominators together, and the numerators together, separately to get a single expression

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WINSTONCH [101]

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An electrician has a piece of wire that is 4 and 3/8 centimeters long. She divides the wire into pieces that are 1 and 2/3 centi

Vlada [557]

Answer:

She has approximately 3 pieces ( 2.625)

Step-by-step explanation:

To get the number of pieces, we need to divide the length of the wire by the individual length of the pieces.

To get the division done, it would be easier to convert what we have into improper fractions

For the piece of wire, the length which is 4 and 3/8 centimeters long will be 35/8 centimeters

while;

the individual length of each of the piece which is 1 and 2/3 centimeters long will be 5/3 centimeters

The number of pieces is thus 35/8 divided by 5/3 = 35/8 * 3/5 = 21/8 = 2.625 which is approximately 3 pieces

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3 years ago