In the diagram, secant AP¯¯¯¯¯¯¯¯ intersects the circle at points A and B, and secant CP¯¯¯¯¯¯¯¯ intersects the circle at points C and D. The lines intersect outside the circle at point P.
A circle with no center shown and two secants as described in the text. Points A, B, D and C lie on the circle. Segment B P equals 6, segment C D equals 7, and segment D P equals 5.

What is the length of AP¯¯¯¯¯¯¯¯?
Enter the correct value.

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9

What are the solutions of the given equation 2x^2+9x+10=0

1. draw a histogram from all the data. starting at the bottom row, for each set of 10 flips, place an "x" in the column corresponding to the number of heads that set produced. your histogram should look similar to the example below: 2. calculate the mean and standard deviation. mean = standard deviation = 3. calculate the percent of the data that is within 1, 2, and 3 standard deviations of the mean. within 1 standard deviation = % within 2 standard deviations = % within 3 standard deviations = % 4. compare your results to a normal distribution. interpret any differences.