question solve the following and express each answer in scientific notation and to the correct number of significant figures
{"Image DocumentName": "Question Solve the following and express each answer in scientific notation and to the correct number of significant figures.", "Image ImageDescription": "(5.3 x 104) + (1.3 x 104) 6.6 x 104. (7.2 x 10-4) / (1.8 x 103) 4.0 x (104)(10-3) (106) 107. (9.12 x 10-1) - (4.7 x 10-2) 8.65 x (5.4 x 104) (3.5 x 109) 18.9 x 1013 or 1.9 x", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}