Sigfig with double dimensional analysis

(9.0+0.008)/(3.45+0.234)

(0.00980x1201)+3.456

139000+3.679+4.6x0.007

9.000x6.8-12.000

2.5 nm/hour convert to __ ?___x10^-13m/s

How many significant is in this conversion factor: 1 mile = 1609.3 m

• 0

• Infinite

• 5

• 1

3.45+7.8-0.034=

700.9-3.457+12=

25.000+2-7.829

convert 45000km/min to 7.5x 10 ^? nm/ms (fill in the correct exponent)