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Setler [38]
3 years ago
9

A hot air balloon holds 3,249 cubic meters of helium. The density of helium is 0.1785 kilograms per cubic meter. How many kilogr

ams of helium does the balloon contain, rounded to the nearest tenth of a kilogram?
1,873.4 kg
2,194.6 kg
2,721.2 kg
579.9 kg
Mathematics
2 answers:
Mnenie [13.5K]3 years ago
7 0

Answer:

D: 579.9 kg

Step-by-step explanation:

3,249 * 0.1785 = m/3,249 * 3,249

professor190 [17]3 years ago
5 0
We find the answer by using the density formula: d  =m/v
We know the density: 0.1785
We know the volume: 3,249
We DO NOT know the mass, so that is what we're trying to finding
0.1785 = m/3,249
Solve:
3,249 * 0.1785 = m/3,249 * 3,249
579.9465 which can be rounded to 579.9
The answer is D. 
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zhannawk [14.2K]

Answer:

17,068,935 square feet

Step-by-step explanation:

square feet 1 wall = 813*1615 = 1312995

square feet 13 walls = 1312995*13 = 17068935 squre feet

8 0
2 years ago
90/110 reduce the fraction
IrinaVladis [17]
90/110 reduces to 9/11. Good luck!
6 0
3 years ago
An open box is made from an 8 by ten-inch rectangular piece of cardboard by cutting squares from each corner and folding up the
natka813 [3]

Please find the attachment.

Let x represent the side length of the squares.

We have been given that an open box is made from an 8 by ten-inch rectangular piece of cardboard by cutting squares from each corner and folding up the sides. We are asked to find the volume of the box.

The side of box will be 8-x-x=8-2x and 10-x-x=10-2x.

The height of the box will be x.

The volume of box will be area of base times height.

\text{Volume of box}=(8-2x)(10-2x)\cdot x

Now we will use FOIL to simplify our expression.

\text{Volume of box}=(80-16x-20x+4x^2)\cdot x

\text{Volume of box}=(80-36x+4x^2)\cdot x

Now we will distribute x.

\text{Volume of box}=80x-36x^2+4x^3

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Therefore, the volume of the box would be V(x)=80x-36x^2+4x^3.

6 0
3 years ago
Did I do this right ? I feel like I didn't do it right, if I didn't can you help me figure it out please :((?
IrinaK [193]
16,000,000/2.25 =
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How much per week?
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Rounded
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3 0
3 years ago
HELP HELP PLEASE the height of the triangle is 16 cm, and fe=10 cm. What is the area of the triangle? A. 50 CM^2 B. 80 CM^2 C.16
enyata [817]

Answer:

B. 80 cm^2

Step-by-step explanation:

A = bh/2

A = (FE)(16 cm)/2

A = (10 cm)(16 cm)/2

A = 80 cm^2

4 0
3 years ago
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