Four friends are playing a "Guess my Age" game. The come up with the following clues. Dave's age is 15% of Sabrina. Luca's age is 75% of Sabrina and Rhianna is 300%
of Dave. The sum of their ages is 141. How old is Rhianna?
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Need solving this second acceleration problem.

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2