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hammer [34]
3 years ago
15

If 1.3 grams of air has a volume of 1000 cm³, what is the density of air

Mathematics
1 answer:
Bumek [7]3 years ago
8 0

Answer:

Density is equal to mass/volume, so in your case:

density=1.3/1000=0.0013 g/cm^3

Step-by-step explanation:


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A car run 3/4 mile per minute another car can run 4/5 mile per minute.what is the difference in speed in miles per hour?
dybincka [34]

Answer:

3 miles per hour

Step-by-step explanation:

We need to subtract the two numbers to find the difference in speeds

4/5 - 3/4

We need to get a common denominator of 20

4/5 *4/4 - 3/4 *5/5

16/20 - 15/20

1/20  

The car going 4/5 miles per minute is going 1/20 miles per minute faster than the car going 3/4 miles per minute.

The question asks for miles per hour, not miles per minute.  We know  that there are 60 minutes per hour.

1/20 miles per minute * 60 minutes / hour

60/20 miles/hour

3 miles/ hour

The car going 4/5 miles per minute is going 3 miles per hour faster than the car going 3/4 miles per minute.

3 0
3 years ago
Grapes cost $4.99 for 4 pounds at the supermarket.They 6.99 for 6 pounds at food mart.Witch store has a better deal?
Triss [41]

Answer:

food mart

Step-by-step explanation:

supermarket= 1 pound cost $1.2475

food mart= 1 pound cost $1.17

5 0
3 years ago
A 20-ounce bag of popcorn costs $2.80. If the unit price stays the same, how much does a 35-ounce bag of popcorn cost?
Wittaler [7]

Answer:

I think the answer is C

4 0
3 years ago
I need help with this geometry math assignment I been struggling and I need help on it very fast and it is due today so please h
deff fn [24]

Answer:

One tip: Do the top first

Step-by-step explanation:

4 0
3 years ago
Which property can be used to expand the expression -2(3/4x+7)
geniusboy [140]

Answer:

B. <u>the distributive property</u>

Step-by-step explanation:

<u>Distributive </u><u>property</u> can be used to expand the expression -2(3/4x+7).

When that property is used, we need to distrubute the monomial to the binomial which is the two terms.

- 2( \frac{3}{4} x  + 7) \\  \Longrightarrow \boxed{- 2( \frac{3}{4} x) +  - 2(7)}

#BrainliestBunch

4 0
3 years ago
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