Pi (1t) can be approximated using decimals as the ratio 3.14: 1. Find 3 ratios equivalent to the ratio 3.14: 1.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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)

Pls never taught i’m really confused and i rlly need