A recent survey found the following distribution for the number of hours a person sleeps per night.
12
Less than 6 hours
6 hours
7 hours
26
30
28
8 hours
More than 8 hours
4
100
Find the probability that the person sleeps at most 8 hours per night.
Enter your answer as a reduced fraction a/b.

The table respent two linear functions the equation respented by the first tables is given

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.