Can someone help find a trigonometric function for this ?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Aline that intersects one of two parallel lines intersects the other also always sometimes never

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?