Answer:
7:8
Step-by-step explanation:
4/5, because to simplify a decimal, you can divide the numerator by the denominator. 4 divided by 5 is 0.8
The required, divide is given by 
<h3>What is fraction of polynomial?</h3>
Fraction of polynomial is, in the numerator and in the denominator of a fraction there is polynomial function




Thus the required, divide is
.
Learn more about Fraction of polynomial here:
brainly.com/question/9686817
#SPJ1
It travels a foot each day so it would take 20 days to fall back down to 19
Answer:
4 Minutes = 240 seconds = 6*40 seconds
30*(1/2)^6 = 30*1/64 = 30/64 = 15/32 = 0.5
4 minutes later there is approx. 0 to 1 bacteria alive.