In the figure below, ac is tangent to circle b. ba is a radius of circle b and a is a point of tangency. if ab is equal to 85 and ac is equal to 110, what is the approximate measure of segment bc?

a.138
b.137
c. 136
d.139

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost