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06 Mar 2025, 01:40
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Difficulty:
85%
(hard)
Question Stats:
55% (02:20) correct
45%
(02:33)
wrong
based on 138
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P is growing a snake which doubles every three hours. If there will be 5.12 x 10^6 in 12 hours, how many were there 6 hours ago?
A. 6.4 x 10^5
B. 3.2 x 10^5
C. 1.6 x 10^5
D. 8.0 x 10^4
E. 4.0 x 10^4
A. 6.4 x 10^5
B. 3.2 x 10^5
C. 1.6 x 10^5
D. 8.0 x 10^4
E. 4.0 x 10^4
06 Mar 2025, 01:44
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Let the number 6 hours ago be x
In 6+12 = 18hours, it will have doubles 18/3 = 6 times
x*2^6 = 512*10^4
x = 8*10^4
In 6+12 = 18hours, it will have doubles 18/3 = 6 times
x*2^6 = 512*10^4
x = 8*10^4
Bunuel
06 Mar 2025, 04:01
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P is growing a snake which doubles every three hours.
If there will be 5.12 x 10^6 in 12 hours, how many were there 6 hours ago?
6 hrs ago means 2 doubling has occurred.
In 12 hrs means 4 doubling will happen.
x — 2x — 4x — 8x — 16x — 32x — 64x
The question statement is made at location 4x
Given 64x = 5.12*10^6 =512*10^4
Hence x =( 512*10^4 )/64
=8*10^4
Option D
If there will be 5.12 x 10^6 in 12 hours, how many were there 6 hours ago?
6 hrs ago means 2 doubling has occurred.
In 12 hrs means 4 doubling will happen.
x — 2x — 4x — 8x — 16x — 32x — 64x
The question statement is made at location 4x
Given 64x = 5.12*10^6 =512*10^4
Hence x =( 512*10^4 )/64
=8*10^4
Option D
