Answer:

Step-by-step explanation:
Given:
Given polynomial function is.

Hours 
We need to find the concentration of the antibiotic after 3 hours.
Solution:
Rewrite the given polynomial function as.

Substitute
in given polynomial function.





Therefore, the concentration of the antibiotic after 3 hours
.
Answer:
Step-by-step explanation:
Let x = the original number of books
Then 0.375x = the total number of biographies
and 0.20 x = the original number of biographies

Answer:
The sample proportion from the sample of 900 is more likely to be close to the true population proportion, p.
Step-by-step explanation:
for the first one
To find (fg)(x), you must mult. together the two binomial functions f and g:
(fg)(x) = (6-5x)(6x^2+x = 36x^2 + 6x - 30x^3 - 5x^2
and then you must combine like terms: (fg)(x) = -30x^3 + 31x^2 + 6x