Question

A jet flies at a rate of 1.3 x 10^ 6 feet per hour. Written in scientific notation, which is the best estimate of how many feet the jet will travel in 2.8 x 10^ 3 hours?

Answer 1

(1.3 * 10^6)(2.8 * 10^3) = (1.3 * 2.8) = 3.64.....(10^6 * 10*3) = 10^9
3.64 * 10^9 <==

Answer 2

(1.3X10^6ft/hr)(2.8X10^3hr)

(1.3*2.8)(10^6*10^3)

Rule (a^b)(a^c)=a^(b+c)

(3.64)(10^(6+3))

3.64(10^9)

3.64X10^9 ft

Technically we only had two significant figures and the answer should be:

3.6X10^9  if we were to express our answer to the correct number of significant figures....