Answer:
A.
Step-by-step explanation:
Answer:
$52.60
Step-by-step explanation:
Start with 135.10 and subtract the withdrawls (60, 45)
135.10-60-45 = 30.10
Add the deposit 22.50
30.10 + 22.50 = 52.60
Answer:
4^x - 2^(x+1) = 48
x=3
Step-by-step explanation:
Answer:
b. Because the probability of being 15 or more correct is 0.0207, it is likely that she is just guessing at the questions.
Step-by-step explanation:
-This is a binomial probability distribution with p=0.5, n=20 and x=15.
The function is expressed as:

We calculate the probability of guessing 15 or more correctly:

The probability of passing, guessing 15+ correctly, is 0.0207. This probability is very low and it is it is likely that she is just guessing at the questions