Estimate the difference between the decimals 9.25 and 6.5 by rounding to the nearest whole number before subtracting.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax