What is the least four-digit positive integer, with all different digits, that is divisible by each of its digits

What is the multiplicative rate of change of the exponential function shown on the graph?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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)