Pleaseee help answer correctly

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

What is the volume of the sphere shown below with a radius of 3?

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.