What 1/10 of 0.3 ? and is 3.0 10 times as much as 0.3 ?

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.

If the value of cos330°is√3/2 then find cos 165°.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab