This is equal to the probability that no light fail. Probability of one light not failing = 0.98.
P(no light fails) = 0.98^20 = 0.67 or 67% to nearest percent.

Solution:
Given expression:

To solve the expression:

<em>If f(x) = g(x) then ln(f(x)) = ln(g(x)).</em>
Using the above condition, we can write

Apply log rule: 

Divide both side of the equation by
.


The answer is
.
Answer:
9000 - 500m
Step-by-step explanation:
Your original number is 9000. It starts to decrease at a rate of 500 feet per minute. So we know that you will subtract 500 from 9000 but we don't know how many times. Because of this, we will put a variable to represent the minutes that we are descending.
In conclusion: 9000 - 500m