Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 8

**chemistry**

Suppose the concentration of sodium in Phoenix tap water is 70 ppm (mass based), then what is the concentration of sodium in milligrams per liter? The density of water is 1 g/mL. The answer units are mg/L.

**Art**

c. calligraphy

**art 101**

a. if it is a painting d. if it is a sculpture

**Science**

suppose that sunlight falls on both a pair of reading glasses and a pair of dark glasses. Which pair of glasses would you expect to become warmer? defend your answer.

**calculus**

Find the area of the largest rectangle that has its lower base on the x-axis and its upper vertices on the parabola whose equation is given by Y=12-x^2. i graphed the equation but its gives me a parabola, so i dont know what to do after that

**calculus**

A format for textbook page layouts is to be chosen so that each printed page has a 4-cm margin at the top and at the bottom and a 2-cm margin on the left and right sides. The rectangular region of printed matter is to have an area of 800 sq. cm. Find the dimensions for the pag...

**math**

A box with a rectangular base and rectangular sides is to be open at the top. It is to be constructed so that its width is 8 meters and its volume is 72 cubic meters. If building this box costs $20 per square meter for the base and $10 per square meter for the sides, what is t...

**maxima/minima problems**

A regular box is open at the top and has a square base. To construct the box costs $4 a square foot for the base and $3 a square foot for its sides. Find the cost of the least expensive box and the dimensions of this least expensive box. There is not enough data given to set u...

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