The United States has been consuming iron ore at the rate of () million metric tons per year at time , where is measured in years since 1980 (that is, =0 corresponds to the year 1980), and ()=15.640.012. Find a formula T() for the total U. S. consumption of iron ore, in millions of metric tons, from 1980 until time .

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)