Someone help me out on this one please

Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2