Question

An antibiotic kill 60% of bacteria in a sample of 100,000 each day. The Equation p1

Answer 1

Answer:

The correct option is the last

Step-by-step explanation:

To answer this question we must remember the exponents properties  

It is known that when we have division of exponents of equal base, then we place the same base and subtract the exponents.

In this problem we do the opposite, that is, we have an expression in the form of exponents and we write it as the division of exponents of the same base.

$p_2 = 100000(0.4) ^ {d-4}$

Then p2 can be written as:

$p_2 = \frac{100000 (0.4) ^ d}{(0.4) ^ 4}\\\\p_2 = \frac{100000 (0.4) ^ d}{0.0256}\\\\p_2 = 3906250 (0.4) ^ d$

Therefore the correct option is the last

Answer 2

Answer:

D

Step-by-step explanation:

The answere is d