A bag contains four red marbles, six green marbles, eight yellow marbles, and two blue marbles. Find the probability of drawing a blue marble, replacing it, then drawing a yellow marble

See detailed explanation below.

Step-by-step explanation:

Total marbles in the bag

= 4 red + 6 green + 8 yellow + 2 blue

= 20 marbles.

Probability of event that a blue on first draw, P(B) = 2/20

Marble was then replaced to remain a total of 20 marbles.

Probability of event that a yellow in the second draw, P(Y) = 8/20

The probability of both events happening is the product of the probabilities of the events, hence

P(B then Y) = 2/20 * 8/20 = 16/400 = 1/25

The probability of drawing a blue marble, replacing it, then drawing a yellow marble  is 1/25.

i dont know sorry

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet