Suppose a drop of dye, with a concentration of 1 unit, is dropped at latex: x=0x = 0 at latex: t=0t = 0. at latex: t=5t = 5, the variance latex: (\sigma^2)( σ 2 ) of the concentration curve is found to be 20. estimate the diffusion coefficient latex: (d)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?