1 year ago

An object has a mass of 560 kg and a volume of 8 m3. find the density of the object in kg/m3.

1 answer:

6 0

The density is 70 kg/m3. Here’s how I found it:
1: the formula for density is mass divided by volume (560/8)
2: 560/8=70
3. The label is kg/m3

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love history [14]

The answer would be C: 2/3
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3 years ago

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Is the answer 200? Or 4.5??? Or is none ? I don't know it's confusing :/ can I get help :/

skelet666 [1.2K]

Let x = the number of penguins we are finding

x ÷ 100 × 30 = 15
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The number of hours a lightbulb burns before failing varies from bulb to bulb. The population distribution of burnout times is s

liubo4ka [24]

ANSWER:

The average burnout time of a large number of bulbs has a sampling distribution that is close to Normal.

STEP-BY-STEP EXPLANATION:

The cental limit theorem states, that id the sample size is large (30 or more), then the sampling distribution of the sample means is approximately normal with mean ц and standar deviation б/ $\sqrt{n}$

Thus the correct answer is the average burnout time of a large number of bulbs has a sampling distribution that is close to Normal.

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3 years ago

The class treasury contained 30$ in nickels and dimes. If there were 500 coins than how many coins of each type are there?

Alenkasestr [34]

Equation 1. N+D=500

equation 2 5N+10D=3000
This is for equation 1
N=500-d
Substitute into equations 2 and solve for D
5N+10D=3000
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2500-5D+10D=3000
5D=500
D=100
Lets go back the equation 1
N=500-D
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