REST
P x R XT
Jenny wants to put $100 into a savings account for her brand new baby daughter! She doesn't know if she
should put money into an account that has SIMPLE INTEREST or an account that has COMPOUND
INTEREST. Both banks offer a savings account with 5% interest. How much will each account have after 10
years?
13
How do you write 5% as a decimal?__
= Rate
Simple Interest
How do you solve? Write in your own words
Compound Interest
How do you solve? Write in your own words
Time (years)
Account Balance
Time (years)
Account Balance
(Account
Balance x Rate)
10
What's a quicker way to calculate SIMPLE INTEREST after 10 years? (hintl Look at the equation at the top of
the page? & Solve

your answer is 228

step-by-step explanation:

add the top and bottom bases together, then divide them by 2, then multiply by the height.

29933333.33

step-by-step explanation:

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.