How many ounces of a 5% alcohol solution must be mixed with 9 ounces of a 10% alcohol solution to make a 6% alcohol solution

the value of x is 28.2

you have 6 equal triangles, find the area of one of them (b*h/2) and multiply by 6

(8*4: 2)*6 =

32 cm² is your answer

pi or 3.14159265359 is an irratinal decimal

in counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: httt, thtt, ttht, or ttth. each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.