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matrenka [14]
3 years ago
8

4.

Mathematics
1 answer:
tiny-mole [99]3 years ago
8 0

Answer:

7

Step-by-step explanation:

7 =2 hx x e

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6.5 liters per 100 km travelled. 30% of 5 is 1.5, so adding this to the original amount results in 6.5
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Hi can anyone help with this I'm really tired ngl<br><br>What is the area of the hexagon
laila [671]

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Step-by-step explanation:

5 0
2 years ago
Determine the mass of a solid steel ball that has a diameter of 10 cm. The density of pure steel is 8.09 g/cm3
Basile [38]

Answer:

<em>The mass of the steel ball is 4,235.9 gr</em>

Step-by-step explanation:

<u>Density</u>

The density ρ of a substance is a measure of its mass per unit volume:

\displaystyle \rho=\frac{m}{V}

If the density and the volume are given, the mass can be calculated by solving the above formula for m:

m=\rho.V

We know the density of pure steel ρ=8.09 gr/cm3 and the diameter of a solid steel ball d=10 cm.

We need to calculate the volume of the sphere:

The volume of a sphere of radius r is given by:

\displaystyle V=\frac{4}{3}\cdot \pi\cdot r^3

The radius is half the diameter: r= 10/2 = 5 cm. Thus:

\displaystyle V=\frac{4}{3}\cdot \pi\cdot 5^3

Calculating:

V=523.6\ cm^3

The mass is:

m=8.09 gr/cm^3 \cdot 523.6\ cm^3

m=4,235.9 gr

The mass of the steel ball is 4,235.9 gr

4 0
3 years ago
If Alex and Mpho have to share R20 in the ratio 2:3,how much will Mpho get?
CaHeK987 [17]

Answer:

D

Step-by-step explanation:

sum of ratio=2+3=5

Mpho gets=3/5×20=12

4 0
3 years ago
Please help quick! Thank You!
Softa [21]

Answer:

8      7

Step-by-step explanation:

15/10-8/10=7/10

4 0
3 years ago
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