THE ANSWER IS D
YOU HAVE AT TIME ZERO 10 BACTERIA,
AFTER 15 SEC YOU HAVE 20 BACT
AFTER 30 SEC THE NUMBER DOUBLES SO YOU HAVE 40 BACT
AFTER 45 SEC YOU YOU HAVE 80
AND SO ON, AFTER 120 SEC YOU HAVE 2560 BACT
Answer: 
Step-by-step explanation:
To find the inverse of a function replace f(x) with x and the original x with y

Now we can solve for y
Square both sides so we can cancel out the root

Now subtract 7 from both sides

Now replace y with the inverse of f(x), 
Answer:

Step-by-step explanation:
Given


Required
The fraction of students in the school that ate Pizza
To do this, we simply multiply the fraction of track students and those among them that ordered pizza.
So, we have:




Answer:
x=-7
Step-by-step explanation:
-70/10x= -7x