tak murakami has a savings account at city saving bank. the account earns 5.5% interest compounded daily. on febuary 2,the ammou
nt in his account $580. how much will be in the acoount in 40 days
1 answer:
Answer:
Step-by-step explanation:
In the original question as shown in the attached picture, there is a compound interest table.
According to the table, Amount of $1.00 at 5.5% Compounded Daily after 40 days is $1.00604.
Using the formula: Amount = Original Principal x Amount of $1.00,
the amount in account after 40 days = $580 x 1.00604
= $583.5032
= $583.50 rounded to the nearest cent
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Answer:
2.28% of tests has scores over 90.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
What proportion of tests has scores over 90?
This proportion is 1 subtracted by the pvalue of Z when X = 90. So
has a pvalue of 0.9772.
So 1-0.9772 = 0.0228 = 2.28% of tests has scores over 90.