The total number of fungal spores can be found using an infinite geometric series where a1 = 8 and the common ratio is 4. find the sum of this infinite series that will be the upper limit of the fungal spores.

This infinite geometric series is divergent and thus we cannot find the sum. The sum is infinity.

Step-by-step explanation:

There are two types of geometric series: convergent and divergent.

The sum of an infinite geometric sequence is given by the formula:

Sum =

Where,

r is the common ratio and

If absolute value of r is NOT less than 1, then the series is divergent and sum cannot be found.

For our given problem, ,  clearly   , which is NOT less than 1, so the series is divergent and sum cannot be found.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%