Add 7.3×107+1.8×107 . Which is the correct sum?(1 point)
Responses
8.1×107
8.1 times 10 superscript 7 baseline
9.1×107
9.1 times 10 superscript 7 baseline
9.1×1014
9.1 times 10 superscript 14 baseline
9.1+107
The correct sum is 9.1×107.
The population of a city is given as 3.45×106 . A nearby city has a population of 1.3×105 . What is the sum of the populations of the two cities in scientific notation?(1 point)
Responses
4.75×1011
4.75 times 10 superscript 11 baseline
35.8+105
35.8 plus 10 superscript 5 baseline
3.58×106
3.58 times 10 superscript 6 baseline
4.75×105