Question

(1.21 x 10^5) + 9,500 must be in Scientific Notation

Answer 1

$(1.21\cdot10^5) + 9,500=1.21\cdot100,000+9,500\\\\=12,100\cdot9,500=21,600=2\underbrace{1600.}_{\leftarrow4}=2.1\cdot10^4$