Thank you so much, CPhill, for helping me with a step by step solution for this problem! Probability is one of the few subjects that I don't understand in math. I have other similar math problems, but with a different approach. I don't know if I should solve them the same way as this here, so it's something to look at for more teaching.
A = P(1 + r)t
P = original amount
r = interest rate expressed as a decimal (0.03 in this case)
t = time in years
A = computed amount after t years
The total amount of money after one year of interest:
A = 100(1 + 0.03)1
A = 100(1.03)1
A = 100(1.03)
A = 103
The total amount of money after six years of interest:
A = 100(1 + 0.03)6
A = 100(1.03)6
A = 100(1.19405229653)
A = 119.405229653
Thanks for the help CPhill! I'm sure that these answers are correct.
Let's see if I can finish this problem. The z-score for Anna is -0.42 and the z-score for Bill is -2.20. They both have a z-score less than 0, but the one that has the more UNUSUAL grade point average is Bill with a z-score furthest from 0. The answer will be C. Bill, because his z-score is further from the mean than Anna’s. Thank you for helping!