Write an equation out the cosine function with amplitude 2 and period of 6pi
y=-2 cos (1/6x)
y=-1/2 cos (1/3x)
y=2 cos (1/3x)
y=1/2 cos (1/6x)

answer:

use a algebra caculator on the web c: it sometimes helps

Step-by-step explanation:

u dont have to since it doesnt show all the answers

step-by-step explanation: as sides and hieghts are not mentioned so

i assumed myself that

one base side = 11

second base side = 15

third base side= 16

height= 17

surface area = (surface area of lower base) + (surface area of uper base)+{( one base side +second base side + third base side)}×height

                  =     872