Help 20 points brainliest

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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)