Answer:
The amount in checking will always be twice in any week.
Step-by-step explanation:
Let's say, 
represents the week, 
represents the saving account and 
represents the checking account.
Balance in saving account in any week 
Balance in checking account in any week 
Translate the statement into mathematical equation. Remember to use " = " for word "is" in the given statement.
We have to find for 
.
Putting the values, we have:
Which means in each week the amount in checking is twice the amount in savings.
Best Regards!
Answer:
P(X = 12) = 0.0064.
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which 
is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
In this problem we have that:
We want P(X = 12). So
P(X = 12) = 0.0064.
A b and 3 is the correct answer
Answer:
x=6. x=15
Step-by-step explanation:
13. x=6
16. x=15
Answer: 5 (x > 12) or 5 + m(12 - x) (x < 12)
Step-by-step explanation:
flat fee $5 for first x days +
m dolars per day after x days
So, if x > 12, for 12 days the fee is $5 because it is a flat fee that do not depend of the numbers of day.
But, we do not know how many days x is, so
if x < 12, a person will pay, for 12 days, the m times the difference of the days passed x:
5 + m(12-x)
