Life for one car model varies Normally with a mean 84 mg/mi and standard deviation 6 mg/mi. A company has 16 cars of this model in its fleet. What is the probability that the average NOX + NMOG level ¯ of these cars is above 90 mg/mi?

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

∠cbe and ∠deb are same-side interior angles.

i took the test

21

jk it's 20

step-by-step explanation: