Answer:
8
Step-by-step explanation:
Isn't it simple because all other numbers are less than 4?
where
- P is the population
- P₀ is the initial population
- r is the rate
- t is the time
In the given problem, r = 2 (because the amoeba double every hour). So,
Answer:
264 Miles
Step-by-step explanation:
Let's imagine that going to the mountains she traveled at x miles per hour. Then according to the problem, on the way home, without traffic, she traveled at x + 22 miles per hour.
We know that the distance is the same in each direction.
If she traveled at speed x for 6 hours going to the mountains, the distance she traveled was 6x.
Coming home she traveled at speed (x + 22) for 4 hours, or 4(x + 22).
But since the distance is the same each way, we can say
6x = 4(x + 22)
Now we can just manipulate the equation to solve for x.
6x = 4x + 88
2x = 88
x = 44.
If x = 44, then her trip to the mountains we 6 hours times 44 miles per hour, or 264 miles.
(https://www.wyzant.com/resources/answers/91993/martina_drove_to_the_mountains_last_weekend_there_was_heavy_traffic_on_the_way_there_and_the_trip_took_6_hours_when_martina_drove_home_there_was_no_traff)
Answer: -2
Step-by-step explanation:
Twenty is 40% of 50 because 10% of 50 is 5 so 5*4 = 20