Anybody else play or use to?

There are a total sales of 2,000 dollars on monday on tuesday sales dropped 10% on wednesday sales dropped another 20% compared with tuesday from wednesday to thursday sales increases by an equal amount to 25% of monday total sales what is the net change in dollars on total sales from monday to tuesday

Lines de and ab intersect at point c what is the value x? a.12b.25c.38d.52

Determine where, if anywhere, the tangent line to f(x)=x^3−5x^2+x is parallel to the line y=4x+23