In a ratio of 7:3, for every 7 adults you have 3 children. So 30% of the total are children. I.e. if you have 10 people .7 times (10) are adults or 7 and .3 times (10) are children or 3. So for 370 people, .3 times 370 are children, or 111.
A sample is best defined as 'a smaller group selected from a given population'.
I think the answer is 1d.
Answer:

Step-by-step explanation:
we know that
The equation of a exponential decay function is equal to

where
r is the number of bacteria remaining
n is the number of hours since the antibiotic was applied
a is the initial value
r is the rate of change
we have

substitute

