I need help with this question !!!

[foofoomomo]

It is estimated that t years from now, the amount of waste accumulated, Q, in
tonnes, will be Q(t) 104(t2 15t 70) tonnes, 0<or equal t<or equal 10.

a. How much waste has been accumulated up to now?
b. What will be the average rate of change of this quantity over the next
three years?

 

[Deleted member 4993]

It is estimated that t years from now, the amount of waste accumulated, Q, in
tonnes, will be Q(t) 104(t2 15t 70) tonnes, 0<or equal t<or equal 10.

a. How much waste has been accumulated up to now?
b. What will be the average rate of change of this quantity over the next
three years?

The problem states:

"...will be Q(t) 104(t2 15t 70) tonnes, 0<or equal t<or equal 10."....... That does not make sense to me! Please review and post edited version as necessary.

Please show us what you have tried and exactly where you are stuck.

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[HallsofIvy]

It is estimated that t years from now, the amount of waste accumulated, Q, in
tonnes, will be Q(t) 104(t2 15t 70) tonnes, 0<or equal t<or equal 10.

I don't know what "Q(t) 104(t2 15t 70)" means! Is it possible that you mean
"Q(t)= 104(t^2+ 15t+ 70)?

a. How much waste has been accumulated up to now?

The formula is for "t years from now". What is t now?

b. What will be the average rate of change of this quantity over the next
three years?

How much waste will have been accumulated 3 years from now? Subtract your answer to (a) to determine how much will be accumulated in the next three years. Divide by 3 to determine the rate of change in "tonnes per year".