To find mass of the cube first find volume of cube material
edge of cube = 10 cm
edge of inner cube (hollow space) = 10 - (2.5+2.5) = 5 cm
total volume of cube = 10^3 = 1000
total volume empty space = 5^3 = 125
Volume of cube material = 1000 - 125 = 875 cm^3
Mass of cube = density x volume = 7.9x10 x 875 = 69125 g <span>= 69.125 kg
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Answer:
1. 168 cm^{2}
2. 156 in^{2}
3. 30 cm^{2}
4. 360 ft^{2}
Step-by-step explanation:
All ratio questions. We can set up proportions then cross multiply
1. \frac{8}{12} \frac{112}{x}
8x = (112 x 12)
8x = 1344
x = 168m
2.\frac{4}{8} \frac{78}{x}
4x = (78 x 8)
4x = 624
x = 156in
3. \frac{5}{2} \frac{75}{x}
5x = (75 x 2)
x = 30cm
4. \frac{8}{10} \frac{288}{x}
8x = ( 288 x 10 )
8x = 2880
x =360ft
tn=-3n+10
Substitute 8th term for n into the equation.
tn=-3(8)+10
Multiply the bracket first
=-24+10
tn=-14
Answer: b
I think this is the right answer.
2 is the answer I got it may be incorrect tho
Answer:
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Step-by-step explanation:
