Advertisements
Advertisements
प्रश्न
Bacteria can divide in every 20 minutes. So 1 bacterium can multiply to 2 in 20 minutes. 4 in 40 minutes, and so on. How many bacteria will there be in 6 hours? Write your answer using exponents, and then evaluate.
Most bacteria reproduce by a type of simple cell division known as binary fission. Each species reproduce best at a specific temperature and moisture level.
Advertisements
उत्तर
We know that, 1 h = 60 min
6 h = 60 × 6 min = 360 min
Given, a bacteria doubles itself in every 20 min.
Number of times it will double itself = 360 min/20 min = 18
∴ Bacteria will there in 6 h = 2 × 2 × 2 × ... × 2 (18 times) = 218
APPEARS IN
संबंधित प्रश्न
Simplify:
3 × 44
Simplify:
0 × 102
Evaluate:
`(3^-1xx9^-1)÷3^-2`
Evaluate: 22 x 33
Which is greater:
25 or 52
Complete the table below.
| Sr. No | Indices (Numbers in index form) |
Base | Index | Multiplication form | Value |
| (i) | 34 | 3 | 4 | 3 × 3 × 3 × 3 | 81 |
| (ii) | 163 | ||||
| (iii) | (−8) | 2 | |||
| (iv) | `3/7 xx 3/7 xx 3/7 xx 3/7` | `81/2401` | |||
| (v) | (−13)4 |
Identify the greater number in the following.
53 or 35
The expression for 8–2 as a power with the base 2 is ______.
Express the following numbers using exponential notations:
1029
Identify the greater number in the following:
7.9 × 104 or 5.28 × 105
