# Posts by jau

Total # Posts: 5

**Calculus**

A tank contains 100 grams of a substance dissolved in a large amount of water. The tank is filtered in such a way that water drains from the tank, leaving the substance behind in the tank. Consider the volume of the dissolved substance to be negligible. At what rate is the ...

**Calculus**

A boat is pulled in to a dock by a rope with one end attached to the front of the boat and the other end passing through a ring attached to the dock at a point 6 ft higher than the front of the boat. The rope is being pulled through the ring at the rate of 0.2 ft/sec. How fast...

**Calculus**

A tank contains 100 grams of a substance dissolved in a large amount of water. The tank is filtered in such a way that water drains from the tank, leaving the substance behind in the tank. Consider the volume of the dissolved substance to be negligible. At what rate is the ...

**Algebra**

Let A(t) = 3- 2t^2 + 4^t. Find A(2) - A(1).

**statistics**

For a normal distribution with µ = 200 and ó = 50, what X values form the boundaries for the middle 60% of the distribution?