credit cards in 2000, people charged $1,243 billion on the four most-used types of credit cards. in 2005, people charged $1,838 billion on those same four types of credit cards. what was the rate of change? help me please

Question

credit cards in 2000, people charged $1,243 billion on the four most-used types of credit cards. in 2005,  people charged $1,838 billion on those same four types of credit cards. what was the rate of change? help me please

anonymous · Answer

For $1,243 billion, do you mean $1.243 trillion or $1.243 billion? The comma is confusing me.

anonymous · Answer

i need help on this two question help me please

anonymous · Answer

and confusing two, @hwtrain

anonymous · Answer

Rate of change is calculated by y2 - y1/ x2 - x1

so it should be $1838 - $1243/ 2005 - 2000

$595/5

$119 per year is the rate of change

anonymous · Answer

2nd Ans : 56ft in 8 rotations which means 1 rotation it rotates 7ft so now it is easy to calculate for 20 rotations since it is just 20*7 = 140ft

anonymous · Answer

thanks for everything @ganibl