Question

(7.3x105) + (3.7x105) science notation form please help me

a
1.10x10^11
b
11.0x10^5
c
1.1x10^10
d
1.1x10^6

Answer 1

9514 1404 393

Answer:

d. 1.1×10^6

Explanation:

As with other kinds of sums, factoring out a common factor can make it easier.

(7.3×10^5) + (3.7×10^5) = (7.3 +3.7)×10^5 = 11.0×10^5

Please note this is the sum, and it matches answer choice B, but it is not "scientific notation." To put this back in scientific notation, we must move the decimal point 1 place to the left. That rewrite looks like ...

11.0×10^5 = (1.1×10^1)×10^5 = 1.1×(10^1×10^5) = 1.1×10^(1+5) = 1.1×10^6