How many turning points will a quartic fumction with four real zeros have?

Anyone know? will mark brainliest if you're correct!

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression