The age of the universe is thought to be about 14 billion years. assuming two significant figures, (a) write this in exponential notation in units of years, and (b) use the method shown in class to convert this to seconds. give your answer in exponential notation.

a) 14×10⁹ years

b) 4.4×10¹⁷ seconds

Explanation:

1 billion years = 1000000000 years

1000000000 years = 10⁹ years

14 billion years

= 14×1000000000 years

= 14000000000 years

= 14×10⁹ years

∴ 14 billion years = 14×10⁹ years

b) 1 year = 365.25×24×60×60 seconds

14×10⁹ years = 14×10⁹×365.25×24×60×60

= 441806400×10⁹ seconds

Rounding off,  we get

= 4.4×10⁸×10⁹

= 4.4×10¹⁷ seconds

∴ 14 billion years = 4.4×10¹⁷ seconds

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada