There are 5 + 1 = 6 terms in the binomial expansion of (1−0.02)5, and since the 4th term is approximately 0, the 5th and 6th terms are also approximately 0. So, approximate the value of 0.985 by adding the first three terms: 1 + (-0.1) + 0.004 = 0.904.
6 is easy 7. never divide by a fraction, flip ot upside down and multiply, so multiply by 5 on both sides 8. subtract 3.45 on both sides 9. the answer is just 1
