To solve that question we can think by the following way:
- The first letter can be any of the letters (A, C, T or G). Therefore there are 4 possibilites.
- To choose the second letter of the sequence, any letter also can be chose. So, one more time, there are 4 possibilites.
Using the fundamental principle of counting, we will find out that can be formed differents sequences (for example, AA, AG, TT, TG, CT...).
Know we know that, we can generalize. If I have elements and I must choose one of them times to do a sequence, the total number of sequence that I can form will be .
In our question, we want to know how many DNA sequence are exactly 29 letters long. As indicated above, the answer for that is (29 times) .
Therefore, there are DNA sequences with exactly 29 letters long.
I hope I've helped you. =D
Enjoy your studies. \o/
It should be D. You can multiply both numbers by 10 in order to make it in proportion to the graph. Hope this helps:)
Martín had 164 apples and wanted 56 more than he ate 8 . How many are left ?
Answer:
In the figure attached, the graph of the function is shown.
1. f(9) ≈ 6 means that at t = 9 (year 1977 + 9 = 1986) the cost to produce 1 watt of solar energy was $6
2. f(4) ≈ 25, which means at year 1981 (=1977 + 4) the cost was $25 per watt
f(3.5) ≈ 28, which means at half of year 1980 (=1977 + 3.5) the cost was $28 per watt
3. When f(t) = 45, t is equal to 2, which means that the year wass 1979 (= 1977 + 2)
4. From the graph we can compute the following table:
x | y
0 | 80
1 | 60
The general exponential decay formula is:
f(x) = a*b^x
where <em>a</em> is the initial value and <em>b</em> si the decay factor. Replacing with data from the table:
f(0) = a*b^0
80 = a
f(1) = a*b^1
60/80 = b
0.75 = b