He paid $643.5 for it originally
585 x .1 = 58.5
585+58.5= 643.5
hope this helps
We have the frequencies for each of the grades. We can estimate the number of students graded by adding all those frequencies. Let's call N the total number of grades:

We have then a total number of grades of 39.
The corresponding relative frequency for a grade is the ratio of the frequency to the total number of "samples", 39 in this case.
Then, for grade A, the relative frequency (RF) will be:

This will be the fraction of the total grades that are A. Represented as a percentage will be 10.26%, rounded to two decimal places.
Now, to complete the table we do the same for the other frequencies:
For grade B:

For grade C:

For grade D:

For grade F:
Yes....because a terminating decimal can be turned into a fraction, making it rational
Answer:
No
Step-by-step explanation:
2.5 4/5 8% that is an example of written fractions decimal and percents