Answer:
- B: The pesticide DDT has a half-life of 15 years.
- C: March Madness has 64 teams in the bracket. Each round, half the teams are eliminated.
- D: After an antibiotic is added to a culture of bacteria, the number of bacteria is reduced by half every three hours.
Step-by-step explanation:
Exponential decay describes a situation in which the dependent variable is reduced by the same factor when the independent variable is increased by the same amount.
A — the population is increasing, not being reduced
B — the amount is cut in half when time increases by 15 years (exp. decay)
C — the number of teams is cut in half when the number of rounds increases by 1 (exp. decay)
D — the amount is cut in half when time increases by 3 hours (exp. decay)
E — the population is increasing, not being reduced
Answer:
8!=40320
Step-by-step explanation:
SInce their are 8 athletes and 8 positions we can assume this: The first sprinter has 8 positions to end in, the next has 7 places to finish in, the third has 6 places and so on... Using this we can multiply these possibilities to find that the possibilities are 8×7×6×5×4×3×2 which results in 40320 (this function is known as a factorial and denoted !).
Answer:
X< -1
Step-by-step explanation:
If you subtract the 5 from the 7 leaves you with -2x< 2 and if you divide the negative 2 by both sides makes the -2 cancel itself out and leaves X< -1
This is an independent event because picking on book at random has nothing to do with picking the next book at random. The probability is 1/7
