A typical high-income household in 1980 earned $140,397. A similar household in 2009 earned $168,727. What was the relative increase in income for these households from
1980 to 2009? Round to the nearest one percent.

20.2 %

Step-by-step explanation:

A typical high-income household in 1980 earned $140,397.

A similar household in 2009  earned $168,727.

We need to find the relative increase in income for these households from  1980 to 2009.

It can be calculated as follows :

So, the required percent is 20.2%.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.