All categories

2 years ago

The length of a piece of lumber is 6.5 meters. How many centimeters is this?

Mathematics

2 answers:

Elodia [21]2 years ago

5 0

Since 1 meter = 100 centimeters
then 6.5 meters = 100 × 6.5 = 650 centimeters

patriot [66]2 years ago

4 0

650 cm when you convert it that is what i got it is correct

You might be interested in

Rick wishes to purchase a new car and can afford monthly payments of up to $275

oksano4ka [1.4K]

Answer:

200?

Step-by-step explanation:

8 0

2 years ago

Amelia enjoys running and often runs at a steady pace. At this pace, Amelia can run 50 yards in 12 seconds. What is Amelia's uni

valentinak56 [21]

Answer:

4.16

Step-by-step explanation:

50/12

7 0

2 years ago

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

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:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

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

That is z with a pvalue of $1 - 0.075 = 0.925$ , so Z = 1.44.

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.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

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

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

7 0

2 years ago

Susan has a 12-inch board for constructing a wooden chair.The directions say to use a board that is 29 centimeters long.Id her b

Advocard [28]

We have been given that Susan has a 12-inch board for constructing a wooden chair.The directions say to use a board that is 29 centimeters long. We are asked to determine if Susan's board is long enough to cut or not.

We know that 1 inch is equal to 2.54 cm.

Let us convert 12 inches into cm by multiplying 12 by 2.54.

$12\text{ inches}=12\times 2.54\text{ cm}$

$12\text{ inches}=30.48\text{ cm}$

Since 12 inches is equal to 30.48 centimeters and 30.48 is greater than 29, therefore, Susan's board in long enough to cut.

6 0

2 years ago

Why is the sum of two negative numbers not a positive number

pychu [463]

Answer:

because when two negatives are together they can't add

Step-by-step explanation:

because when two negatives are together they can't add no matter if there's an addition sign

7 0

2 years ago