The expression multiplied by 1 stays the same so you use the communitive property to reorder the terms so now u have 14x
1 1/2 - 2 1/2 is 3/2:5/2 or a 3:5 ratio
2 2/5 - 4 is 12/5:20/5 or a 3:5 ratio
3 3/4 - 6 1/4 is 15/4:25/4 or a 3:5 ratio
4 - 6 2/3 is 12/3:20/3 or a 3:5 ratio
1.2- 2 if divided by .4 is a 3:5 ratio
1.8-3 if divided by .6 is a 3:5 ratio
the unit rate is 3:5
Since all units are 3:5 it is proportional
So we have 299790000, we want to have only one digit in front of the decimal, 2.9979x10^9
hope this helps :)
CosB= 7/25
tanB= 24/7
sinB= 24/25
