A. 1 B. 2 C. 2 D. 4 E. 5 The scientific notation 3.5 ×103 multiplied by 3 is A. 1.05 ×102 B.1.05×1010 C. 1.05×103 D.1.05×109 E. 1.05×104 The scientific notation 8.2×10-4 + 5.4×10-4=……… A.1.35×10-5 B. 1.36×10-4