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Andrej [43]
3 years ago
6

Q.

Mathematics
1 answer:
Verdich [7]3 years ago
7 0
Hehdjdjdjxjxjxjxjxj 1284
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What is the mass of a solid ball of iron with a radius equal to 18 cm if it is known that the density of iron is 7800 kg/m
Shtirlitz [24]

Answer:

60.6528 kg

Step-by-step explanation:

Assuming the solid ball of iron is a sphere with a radius of 18 cm (or 0.18 m), we can compute the volume of the sphere:

V=\frac{4}{3}\pi r^3\\\\V=\frac{4}{3}\pi (\frac{18}{100})^3\\\\V=\frac{4}{3}\pi (0.005832)\\\\V=0.007776

Therefore, the volume of the solid ball is 0.007776 m³

Since we know that density is mass/volume, then we can find the mass of the iron:

\rho=\frac{mass}{volume}\\ \\7800\: kg/m^3=\frac{mass}{0.007776\: m^3}\\\\mass=60.6528\:kg

Thus, the mass of the solid ball of iron is 60.6528 kg

8 0
2 years ago
Concert each mixed number to a fraction greater than 1, or each fraction greater than 1 to a mixed number.
melisa1 [442]
1. Would be 58/11
Because we convert the mixed number to an improper fraction, 5x11+3/11. We then would multiple the numbers with gives us 55+3/11. We add that giving us 58/11
7 0
3 years ago
6 family members share 1/4 of a of chocolate fudge what fraction of a pound does each family member get if they share equally .
photoshop1234 [79]

Answer:

The answer is 1/10

Step-by-step explanation:

7 0
2 years ago
80 kg decreased by 63%
Alina [70]
63% decrease.

0.63•80=50.4kg
80kg-50.4kg=29.6kg
8 0
3 years ago
Eli and his children went into a movie theater and will buy candies and pretzels. Each candy costs $3.50 and each pretzel costs
GenaCL600 [577]

Answer: 3.50c + 3.25p <_ 30

Step-by-step explanation:

You need to put the price of 3.5 C plus the price of 3.25 P to be lest that or equal to $30

5 0
3 years ago
Read 2 more answers
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