an unknown solid is placed on a scale and has a mass of 2.5 grams. the solid the displaces 35ml of water in a graduated cylinder. find the unknown solids density

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?

I’m really confused and need your assist me with this question i’ve never been taught

What is the simplified form of square root of 400 to the 100th power ?