From 1990 to 1994, the mail order sales of health products in the United States can be modeled by
S = 10t^3 + 115t^2 + 25t + 2505
where S is the sales (in millions of dollars) and t is the number of years since 1990. In what year where about $3885 million of health products sold?
3 answers
Just plug in 3885 for S in the equation and solve.
How would I find out the year by plug in 3885 for S and solving?
You have only one variable (t) to solve for.
Isolate the variable on one side of the equation and solve for it.
For this problem you will have to subtract 2505 from bother sides of the equation.
Then factor the remaining equation of t.
Isolate the variable on one side of the equation and solve for it.
For this problem you will have to subtract 2505 from bother sides of the equation.
Then factor the remaining equation of t.
1 answer