Suppose you have a big vat of balls and that 70% of the balls are green and 30% of the balls are red. Suppose you randomly select a ball, record the color, then put the ball back, and repeat the process. (a) What is the probability that the ?rst red ball you encounter will be the third ball you pull from the vat?

42

step-by-step explanation:

256/6=42

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

christopher is 272,195 year old

step-by-step explanation: