Linda used 3 2/3 gallons of gas on Friday and 2 3/5 gallons of gas on Saturday. How many more gallons of gas did she use on Friday?

Explanation:

First:

we can start off by turning the fractions into decimals

so 2/3=0.66

and 3/5=0.60

and we add the whole number

 3.66

- 2.60

which leaves you with 1.06

all that's left is turning it into a fraction

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.