Which of the following represents the general equation for the geometric sequence? -1, -2, -4, ...
A. a n = 2 n - 1
B. a n = -1 · 2 n - 1
C. a n = 1 · 2 n + 1
D. a n = 1 · 2 n - 1

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

Can someone tell me if this is perpendicular? !