What is 5.27 × 1021 expressed in standard notation? 0.527
0.527
5,270,000,000,000,000,000
52,700,000,000,000,000,000
5,270,000,000,000,000,000,000

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project