The product of five rational numbers is positive. at most, how many of these rational numbers can be negative.

Can someone explain to me how to do

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?