math help pls need it less then 20 mins for my Homework?
in the 1940`s record players were made to spin at 78 revolution per minute (rpm). a more modern record player spins a record at a rate of 45 rpm.if both turn table spin for 9 minutes find the difference in the number if turns they make.ORGANZIE YOUR INFORMATION AND EXPLAIN HOW STEP BY STEP
78 revolutions each minute, so to find # of revolutions in 9 minutes, multiply 78 by 9 (=702 revolutions)
Do the same for 45 revolutions per minute (45*9=405 revolutions)
Then you find the difference of the two numbers. (702-405=297)
297 turns is the final answer