Taylor swam 3 different heats in the 100m freestyle. The first heat was 29.1 seconds, the second heat was 28.7 seconds, and the third heat was 27.2 seconds. What was the difference between her best time and her worst time?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

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)