Is the following number rational or irrational? (this is a Khan Academy question)
1 answer:
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The pattern shows multiplication because the earnings are 12 times the number of hours worked in each pair of values.
We are given a graph. The graph shows the number of hours worked versus the earnings in dollars. The values of the x-coordinates are 0, 1, 2, 3, 4, and 5. The corresponding values of the y-coordinates are 0, 12, 24, 36, 48, and 60. We need to find the pattern among these values.
We can see from the data that the values are in a straight line in the graph. The coordinates have the same proportion. The constant of proportionality is calculated below.
k = 12/1 = 12
Hence, the pattern is multiplicative because the earnings are 12 times the number of hours worked for each pair of values.
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<u><em>Answer:</em></u>
5%
<u><em>Explanation:</em></u>
% she earned in interest can be calculated by calculating the % of increase in the balance
<u>We have:</u>
Original balance = $12,450
Amount of interest = $622.5
<u>This means that:</u>
new balance = 12,450 + 622.5 = $13,072.5
<u>Now, we can get the percentage of increase:</u>
% of increase =
<u>Substitute with the values we have to get the percentage of interest earned as follows:</u>
% of interest earned = = 5%
Hope this helps :)