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tiny-mole [99]
2 years ago
12

A weather balloon holds 2,850 cubic meters of helium. The density of helium is 0.1685 kilograms per cubic meter. How many kilogr

ams of helium does the balloon contain? Please round your answer to the nearest whole number. Only enter a numerical value in the answer blank
Mathematics
2 answers:
nekit [7.7K]2 years ago
5 0

Answer:

480

Step-by-step explanation:

Density of a substance is mass per unit volume, Mathematically expressed as

d=m/v

Making m the subject of the formula then

m=dv

Here, d is the density, m is the mass of helium and v is the volume of helium

Given density as 0.1685 kg/m³ and volume as 2850 m³ then jts mass will be equivalent to

Mass=2850m³*0.1685kg/m³=480.225 kg

Rounding off to the nearest whole number, the mass is approximately 480 kg

zaharov [31]2 years ago
5 0

Answer: 480

Explanation: I took the test and this answer was correct.

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a square field has a side 150 m long .There is a road 5 m wide all around the park outside it .Find the cost of constructing the
alisha [4.7K]

Answer:

Cost to construct the road = 775000 rupees

Step-by-step explanation:

Square field has a side = 150 m

Area of the field = (Side)²

                           = (150)²

                           = 22500 m²

Length of the park with road around the field = 150 + 2×(width of the road)

                                                                            = 150 + (2×5)

                                                                            = 160 m

Similarly, width of the park with road around the field = 160 m

Area of the park with road = (Side)²

                                            = (160)²

                                            = 25600 m²

Area of road = Area of the park with road - Area of the park

                     = 25600 - 22500

                     = 3100 m²

Since, cost of constructing the road = 250 rupees per square meter

Cost to construct the road with the given area = 250 × 3100

                                                                              = 775000 rupees

6 0
2 years ago
Solve x+8y/4=9y for x
nikklg [1K]

Answer:

x = 7y

Step-by-step explanation:

x+8y/4=9y

Multiply each side by 4 to get rid of the fractions

4(x+8y/4)=9y*4

Distribute

4x +8y = 36y

Subtract 8y from each side

4x +8y-8y = 36y-8y

4x = 28y

Divide each side by 4

4x/4 = 28y/4

x = 7y

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2 years ago
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That's simply a list of two complex numbers. There's no question asked.
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3 years ago
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Aleks04 [339]

Step-by-step explanation:

Mrs.Rose received a 35% discount on her cell phone. The price of her cell phone came out to be $180. How much was the original price of her cell phone? <the answer is -145 :) >

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A bag of candy contains 2 pieces of bubble gum, 4 jolly ranchers, and 10 tootsie rolls . what is the probability of reaching int
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Bubble Gums and Tootsie Roll = 2 + 10 = 12

P(Bubble Gums and Tootsie Roll) = 12/16 = 3/4
6 0
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