2010年4月25日 · So xy = 1.5\cdot 10^6 y = \frac{1.5\cdot 10^6}{x}. Therefore P = 3x + 2y = 3x + 2\left(\frac{1.5\cdot 10^6}{x}\right) = 3x + \frac{3 \cdot 10^6}{x} = 3x + 3\cdot 10^6 x^{-1}. …

2007年7月28日 · \frac{1}{5}+\frac{1}{8}=\frac{13}{40} of the tank per hour. The remaining time is 4-x hours. So, we have \frac{1}{5}x+\frac{13}{40}(4-x)=1 The 1 on the right side is the entire …

2009年5月9日 · Note that 16 = 4^2. Apply the change-of-base formula to log_16(x) to convert and get:. . . . . 2\log_{16}(x)\, -\, \log_{16}(x\, +\, 3) =\, \frac{1}{2}

2009年7月20日 · The median is just the middle number, disregarding how far apart the numbers might be. I notice that the distance from the minimum weight to the middle weight is 3.0-2.3= …

2010年4月26日 · A man 1.8m tall walks away form the light in a straight path at a speed of 1m/s. How fast is the tip of his shadow moving when he is 10m from the pole? note: visualise the …

2012年5月27日 · The value 16.5 is to the right of 16, but to answer the entire question we need to know even more. Lets say its looking at the probability that the mean is less than 16.5 then …

2012年5月5日 · So, the problem is the following. Let V be the space of functions v continuous on [0,1], with v' piecewise continuous and bounded on [0,1], and v(0) = v(1) = 0. Demonstrate …

2007年11月13日 · I'm going to define a coordinate system such that Jo is in the +x direction compared to Al. (In other words, the +x axis is in the direction Jo is going to be moving off in …

2008年12月12日 · Yes you are supposed to find a new point that would create the shortest sum of the distances AC+BC, C being on X-axis The solution is given in the sketch below A' being the …

2010年6月17日 · X = Number of units in each order so, Time between orders = 1/N Cost of storage between orders=0.6*0.5*X*(1/N) Cost of storage per year = 0.6*0.5*(1/N)*N = …