18. (a) Express 50 minutes as a fraction of 2 hours. (b) Express 6 inches as a fraction of 4 feet.
(c) Express 750 ml as a fraction of 3 L.
(d) Express 80 cm as a fraction of 2 m.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

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)

Write the percent as a fraction or mixed number in simplest form. 0.8%