There were 80 gallons of gas in a tank. Now there are only 50 gallons left. a) calculate the decrease in the amount of gas in the tank as a percentage of the original. This percentage is...

There were 80 gallons of gas in a tank. Now there are only 50 gallons left. a) calculate the decrease in the amount of gas in the tank as a percentage of the original. This percentage is...

The human body is 65 % water. A certain man weighed 150 lb. After 1 year on a diet, his weight decreased by 15 %. Round all the calculations to two decimal points. a. Before...

I was able to answer a I just can't figure out how to do b or c. Let f(x)= x3e-9x a) Find the derivative of f ' (x) I got this answer: -9e-9xx3+3e-9xx2 b)...

This is purely for me wanting to learn more math, this is not an assignment or test Q, I just want to improve my word problem ability, please help :( A company currently sells 600 units...

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