She swims for 2.5 hours at a rate of 2 km/hr
Multiply 2.5 * 2 = 5 km
Answer:
The bacterial culture loses
of its size every 7 seconds.
Step-by-step explanation:
The relationship between the elapsed time t, in seconds, and the number of bacteria, N(t), in the petri dish is modeled by the function:

Since the growth factor is less than 1, it is a decay equation.

Observe that the time t is divided by 7.
This is the period.
We can therefore say that the bacterial culture loses
of its size every 7 seconds.
So we know that the area of a full circle is pi multiplied by radius squared
But for a semicircle the area is pi multiplied by radius squared divided by two
So, we do 3.14*3^2/2
Which is 14.13
The radical expression is D
Answer: 16/81
Step-by-step explanation:
2/3 × 2/3 × 2/3 × 2/3
= 16/81