I need some help plss with this math

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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?

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.