Bella has 8 pies and she can make 2 pies an hour. Tina has 2 pies and she can make 3 in an hour. How many hours will it take for Tina to have as many pies as Bella?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?