Question

H e l p ;- ;

A TV show had 5.6 x 105 viewers in the first week and 4.1 x 105 viewers in the second week. Determine the average number of viewers over the two weeks and write the final answer in scientific notation.

9.7 x 1010
9.7 x 105
4.85 x 1010
4.85 x 105

Answer 1

4.85 x 105

In scientific notation,
5.0925 x 10²

Explanation:

Average =

Total number of viewers in 2 weeks = 5.6 x 105 + 4.1 x 105

Since 105 is common, we can factor it out(you can also calculate each term if you wish

= 105(5.6+4.1) = 105 x 9.7 = 9.7 x 105

Average = 9.7 x 105 /2 = 9.7/2 x 105 = 4.85 x 105

105 x 4.85 = 509.25

In scientific notation, this would be 5.0925 x 10² also written as
5.0925e2