Kala purchased a prepaid phone card for $30. Long distance calls cost 19 cents a minute using this card. Kala used her card only once to make a long distance call. If the remaining credit on her card is $23.73, how many minutes did her call last?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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)