Type the correct answer in the box. Use sigma notation to represent the following series for the first 12 terms.
2 + (-8) + 32 + (-128) + ...

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Find the amplitude of a sinusoidal function that models this temperature variation

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?