07/07/22

how fast is the water level rising when the depth at the deepest point is 5 ft?
A swimming pool is 20ft wide, 40ft long, 3ft deep at the shallow end, and 9ft deep at is deepest point. A cross-section is shown in the figure. If the pool is being filled at a rate of 1.4ft3/min,... more
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R

09/17/19

Pass a data.frame column name to a function?
I'm trying to write a function to accept a data.frame (`x`) and a `column` from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the... more
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04/03/17

Seismology- word problem
An earthquake of magnitude 7.7 occurred in 2001 in Gujarat, India. It was about 4900 times as strong as the greatest earthquake ever to hit Pennsylvania. What is the magnitude of the Pennsylvania... more
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