In a school, 10% of the students have green eyes. Find the experimental probability that in a group of 4
students, at least one of them has green eyes.
The problem has been simulated by generating random
numbers. The digits 0-9 were used. Let the number "9"
represent the 10% of students with green eyes. A sample
of 20 random numbers is shown.
7918 7910 2546 1390 6075
1230 2386 0793 7359 3048
2816 6147 5978 5621 9732
9436
3806
5971
6173
1430
Experimental Probability = [?]%

Find the equation of the line that goes through the points (4, –1) and (2, –5). use slope formula, equation, to find the slope of a line that passes through the points. m = use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line. b = write the equation in slope-intercept form, y = mx + b.

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.