Suppose it takes 4 hours for a certain strain of bacteria to reproduce by dividing in half. If 70 bacteria are present to begin with, the total number present after xxdays is f(x)=70⋅64x
Find the total number present after 1, 2 and 3 days.
There will be bacteria present after 1day, after 2 days and after 3 days.

secondly,
Find f−1for the function ff.
f(x)=4x2+4
f−1(x)=

Ais the correct one

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.