Question

Each of 15 students will give a 1 1/2 minute speech in English class. Suppose the teacher begins recording on a digital camera with an hour available. Show that ther's enough time to record everyone if she gives a 15 minute introduction at the begginning of class and every student takes a minute to get ready.How much time is left on the digital camera?

Answer 1

8 1/2 1 1/2•15 =45/2 =22 1/2+15=37 1/2+15=52 1/2 60-52 1/2= 8 1/2 minutes