Jack typed 80 words per minute when he enrolled in a typing course. His typing speed increased by 3% two weeks into the course. At the end of the course, Jack was able to type his entire 1,680 word document in 20 minutes.
What was the percent of increase in his typing speed from the beginning of the course to the end?
1680wd/20min = 84wd/min
84/80 = 1.05 or a 5% increase in speed.
At the office supply store, a box of 25 pens costs R7.19, a box of 50 pens costs R10.78, a box of 75 pens costs R14.53, a box of 100 pens costs R22.50, and a box of 125 pens costs R26.25. Which box has the cheapest per pen cost?
Well, it looks like Jack really learned how to type in a hurry! Let's calculate his new typing speed first. If he typed his entire 1,680 word document in 20 minutes, then his new typing speed is 1,680 words divided by 20 minutes, which equals 84 words per minute.
Now, let's find out the percentage increase in his typing speed. To do that, we subtract his initial typing speed from his final typing speed, which gives us 84 - 80 = 4 words per minute increase.
To calculate the percentage increase, we divide the increase by the initial typing speed and multiply by 100. So, (4/80) x 100 = 5%.
Therefore, Jack's typing speed increased by 5% from the beginning of the course to the end. Nice one, Jack!
To find the percent increase in Jack's typing speed from the beginning of the course to the end, we need to compare his new typing speed to his initial typing speed.
1. Calculate Jack's new typing speed at the end of the course:
- Jack typed his entire 1,680-word document in 20 minutes.
- Therefore, his new typing speed is 1680 words / 20 minutes = 84 words per minute.
2. Calculate the increase in Jack's typing speed:
- The increase in Jack's typing speed is 84 words per minute - 80 words per minute = 4 words per minute.
3. Calculate the percent increase in Jack's typing speed:
- The percent increase is calculated by dividing the increase in speed by the initial speed and multiplying by 100.
- Percent Increase = (Increase / Initial Speed) * 100
- Percent Increase = (4 words per minute / 80 words per minute) * 100 = 5%.
Therefore, the percent increase in Jack's typing speed from the beginning of the course to the end is 5%.
To find the percent increase in Jack's typing speed from the beginning of the course to the end, we need to compare his initial typing speed to his speed at the end of the course.
First, let's calculate Jack's typing speed after two weeks.
His initial typing speed was 80 words per minute, and it increased by 3%. We can calculate the increase by multiplying 80 by 0.03:
Increase = 80 * 0.03 = 2.4
Jack's typing speed after two weeks is 80 + 2.4 = 82.4 words per minute.
Next, we can calculate Jack's typing speed at the end of the course.
He was able to type his entire 1,680 word document in 20 minutes, so we can calculate his typing speed by dividing the number of words by the time:
Typing speed at the end = 1680 / 20 = 84 words per minute.
To find the percent increase, we compare the initial typing speed to the typing speed at the end:
Percent increase = (Typing speed at the end - Initial typing speed) / Initial typing speed * 100
= (84 - 80) / 80 * 100
= 4 / 80 * 100
= 5%.
Therefore, the percent increase in Jack's typing speed from the beginning of the course to the end is 5%.