Please help I need help I don't understand so if you can help I'll mark you brainiest.

How many zeros does the function f(x)=4x3-x2+1 have

Given abcd ac=38 and ae=3x+4 find the value of x

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?