Write the sum using summation notation, assuming the suggested pattern continues.
-9 - 3 + 3 + 9 + + 81
a.) summation of the quantity negative nine plus six n from n equals zero to fifteen
b.) summation of negative fifty four times n from n equals zero to fifteen
c.) summation of negative fifty four times n from n equals zero to infinity
d.) summation of the quantity negative nine plus six n from n equals zero to infinity

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.

What is a graph with a never ending line called?

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.