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babunello [35]
2 years ago
15

Please help me....

Mathematics
1 answer:
dmitriy555 [2]2 years ago
3 0
Answer: 854 squared kilometres

2 ways u could do it:
45 x 24 = 1080
5 x 20 = 100
9+5=14
14x9 = 126
100+126=226
1080-226 = 854
I just worked out the total area of a whole rectangle then took away the missing parts

Or you could split it into different sections:
24x16=384
24-5=19
19x20=380
9x10=90
384+380+90=854
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IMPORTANT! PLEASE HELP!
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y=-16t²+400
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3 years ago
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The circumference of a sphere was measured to be 82 cm with a possible error of 0.5 cm.
Nat2105 [25]

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A) Maximum error = 170.32 cm³

B)Relative error = 0.0575

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Differentiating with respect to r, we have;

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r is small, so we can write;

ΔC/Δr = 2π

So, Δr = ΔC/2π

We are told that ΔC = 0.5.

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Now, formula for Volume of a sphere is;

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Differentiating with respect to r, we have;

dV/dr = 4πr²

Again, r is small, so we can write;

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Rewriting, we have;

ΔV = ((2πr)²/π) × Δr

Since C = 2πr, we now have;

ΔV = (C²/π)Δr

ΔV will be maximum when Δr is maximum

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B) Formula for relative error = ΔV/V

Relative error = 170.32/((4/3)πr³)

Relative error = 170.32/((4/3)C³/8π³)

Relative errror = 170.32/((4/3)82³/8π³)

Relative error = 170.32/2963.744

Relative error = 0.0575

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Yuliya22 [10]
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