N+n-0.18n= what does this equal?

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.