The function
gives the number of the original trout alive after x years. When the number of the original trout alive is 300, then

Solve this equation:

Answer: after 4.024 year (or 5 year if round to the whole number of years)
X:{a, b, c}, because the numbers(or letters in this problem) cannot repeat.
Answer:
0.02
Step-by-step explanation:
For each of the problems, twice the angle formed by the chords is equal to half the sum of the angles of the arcs.
So, for the first problem, we have

, so

.
For the second,

, so

.
For the last problem,

, so

.
Feel free to comment below if you have any questions!
V=V of cube- V pyramid= 8^3- 7^2*8/3=512-49*8/3=512-130,67=381.33 cm^3