Answer:
Part A:
A. 1.96*2=3.92
B. 1.96*10^3=1,960
C. 1.96*4=7.84
D. 1.969*5=9.845
Part B:
A. 0.784*10^6=784,000
B. 7.84*10^5=784,000
C. 7.84*10^6=7,840,000
D. 78.4*10^5=7,8400,000
Hope this helps.