Events c and d

p(a) = 1/3
p(b) = 1/3
p(a ∩ b) = 0
p(a | b) ≠ 0

What is the area of the trapezoid shown ?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)