Cark earned grades of 62, 78, 59, and 89 on four tests.

what is the mean of his grades

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

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.