What rules should you follow when adding and subtracting scientific notation

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation:

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^

if she was to only spend a dollar she can get 1lb

step-by-step explanation: