7. Yesterday, Keegan read a book that had 220 pages. He started the book before dinner and read at a speed of 50 pages per hour. At bedtime, he read at a rate of 41 pages per hour and finished the book. He spent a total of 5 hours reading. How much time did he spend reading before dinner? Express your answer in hours and minutes.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.