Special product of binomials
help me please:)​

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Proving the congruent supplements theorem

Find the exact value of cos(arcsin( one fourth for full credit, explain your reasoning. (2 points)