A certain delivery service offers both express and standard delivery. 80% of parcels are sent by standard delivery, and 20% are sent by express. Of those sent standard, 80% arrive the next day, and of those sent express, 95% arrive the next day. A record of parcel delivery is chosen at random from the company's files. Required:
a. What is the probability that the parcel was shipped express AND arrived the next day?
b. What is the probability that it arrived the next day?
c. Given that the package arrived the next day. What is the probability that it was sent express?

my discord name is kinglilcliff12#7776

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

125 yards

step-by-step explanation:

i take 75 plus 50.

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )