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# If n = 3.14, find n^3 to the nearest hundredth.

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Math Expert
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If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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04 Mar 2018, 23:54
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Difficulty:

25% (medium)

Question Stats:

87% (01:03) correct 13% (01:07) wrong based on 53 sessions

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If n = 3.14, find n^3 to the nearest hundredth.

(A) 3.10

(B) 30.96

(C) 309.59

(D) 3095.91

(E) 30959.14

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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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04 Mar 2018, 23:55
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If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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05 Mar 2018, 06:18
Bunuel wrote:
If n = 3.14, find n^3 to the nearest hundredth.

(A) 3.10

(B) 30.96

(C) 309.59

(D) 3095.91

(E) 30959.14

Since the answers are so far apart, we can find an approximate answer.

As $$3^3 = 27$$, the value of $$3.14^3$$ to the nearest hundredth is 30.96(Option B)
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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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05 Mar 2018, 12:56
The answer choices makes it easier to select the right choice.

n=3.14 , n^3 = 3.14^3. The closest answer choice is B.

Ans: B
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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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05 Mar 2018, 22:12
Bunuel wrote:
If n = 3.14, find n^3 to the nearest hundredth.

(A) 3.10

(B) 30.96

(C) 309.59

(D) 3095.91

(E) 30959.14

Rounding decimals is very similar to rounding other numbers. If the thousandths place of a decimal is four or less, it is dropped and the hundredths place does not change. For example, rounding 0.643 to the nearest hundredth would give 0.64.

If the thousandths place is five through nine, the hundredths place is increased by one. The decimal 0.646 rounded to the nearest hundredth is 0.65.

Option B
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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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05 Mar 2018, 23:57
3.14 = √10 (approx)

So, 3.14^3 = (10)^3/2 = 10√10 = 31.4 (approx)

Closest Ans is B

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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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06 Mar 2018, 04:47
Bunuel wrote:
If n = 3.14, find n^3 to the nearest hundredth.

(A) 3.10

(B) 30.96

(C) 309.59

(D) 3095.91

(E) 30959.14

n = 3.14

i.e. $$n^3 = 3.14^3$$

i.w. $$n^3$$ = approximately 27 but greater than 27

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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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06 Mar 2018, 11:24
Bunuel wrote:
If n = 3.14, find n^3 to the nearest hundredth.

(A) 3.10

(B) 30.96

(C) 309.59

(D) 3095.91

(E) 30959.14

Sine we see that 3^3 = 27, and 3.14^3 will be close in value to 27, the correct answer is 30.96.

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Re: If n = 3.14, find n^3 to the nearest hundredth.  [#permalink]

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06 Mar 2018, 11:36
Bunuel wrote:
If n = 3.14, find n^3 to the nearest hundredth.

(A) 3.10

(B) 30.96

(C) 309.59

(D) 3095.91

(E) 30959.14

Nearest number to 3^3 i.e 27 is 30.96
Re: If n = 3.14, find n^3 to the nearest hundredth.   [#permalink] 06 Mar 2018, 11:36
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