Answer:
if im not wrong i think it 81 and 9 cause complementary is 2 angles that add up to 90
Step-by-step explanation:
The bag contains 3 red marbles, 4 yellow and 5 blue.
In total we have 12 marbles.
The probability of selecting one blue one will be 5 out of 12.
We will select for a second time, after replacing the first marble. This second case, the probability will be again of 5 out of 12.
Both events are independent because we are replacing the first selected marble. The probability of two independent events to occur is the product of the individual probability of each event. Then, the probability of selecting a blue marble in the 2 events is:
Given:
A rectangular piece of cloth (dimensions):
L = length of the rectangle
W = width of the rectangle
The area of the rectangle is:
A = L x W
If the cloth is cut along the diagonal, the area of one sail will be half the area of the rectangle:
A (one sail) = 1/2 (L x W) <span />