Ba^4•(2ba^4)^-3
the answer key says 1/8b^2a^8 but i don't understand how they got that.

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that