Sarah's age exceeds vika’s age by 16 years. four years ago, sarah was twice as old as vika was then. find the present age of each.

17 in long 1.3 ft wide and 8in high what is the volume

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?