I believe it is referred to as The Substitution Method.
3) Brett arrives 2 hours later than Lionel.
That is the correct answer.
(Sorry, I misinterprated the question before.)
It will take her 5 months because you do 50divided by 12 because there is 12 months in a year
Step-by-step explanation:
a. 246,913,578
2+22+222+2,222+22,222+222,222+2,222,222+22,222,222+222,222,222
b. 0.3+0.33+0.333+0.3333+0.33333+0.333333+0.3333333+0.33333333+0.333333333 =2.962962963