During the period 1998–2002, the number y (in millions) of juvenile books shipped to bookstores can be modeled by the equation y = -15x^2 + 64x + 360 where x is the number of years since 1998.

During what year were there 400 million juvenile books shipped to bookstores?

Question

During the period 1998–2002, the number y (in millions) of juvenile books shipped to bookstores can be modeled by the equation y = -15x^2 + 64x + 360 where x is the number of years since 1998.

During what year were there 400 million juvenile books shipped to bookstores?

anonymous · Answer

Ok, do  you notice how the question is asking for x when y = 400?

anonymous · Answer

yea

anonymous · Answer

Ok so what we have to do is set y = 400.
And we get |dw:1398744250939:dw|