Statistics
posted by Sarah .
bob received a z score of 0.9 on a college entrance exam. If the raw scores have a mean of 540 and a standard deviation of 80 points,what is his raw score?

Z = (score  mean)/ standard deviation
.9 = (score  540)/80
Solve for score. 
i can learn statistics problems

The mean scores on the stats exam was 75 points with a standard deviation of 5 points and becks z score was 2. How many points did he score?