A quadratic equation of the form 0=ax2+bx+c has a discriminant value of -16. How many real number solutions does the equation have? A. -1
B. 0
C. 1
D. 2

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.