Sarah scored 68 out of 80 in a test. write her score as a simplified fraction

7friends share 4 pizzas equally how much pizza did each friend get

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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)