I think it's 0 since anything multiplied by 0 is, well, 0! No matter what the sign is. I believe the correct answer is 0 :)
The common ratio is the multiplication of 2 each time. 5x2= 10// 10x2=20// 20x2=40
Answer:
x = 11.1
Its a right angle triangle with the values of its adjacent and hypotenuse given so cos is used.
I found 3 order pair. I hope this helps let me know if you have any questions:)