Tom rolls 2 fair dice and adds the results from each. Work out the probability of getting a total that is a factor of 21.

How many grams must be adde to 970g to make 1 and a half kg

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)