Please help me i have limited time and im confused A manufacturer is considering building a new and better mousetrap. She estimates the probability that the new mousetrap will be successful is 3/4 . If it is successful, it would be able to make $120,000. Of course, she would make nothing if it were unsuccessful. The development costs for the mousetrap are $98,000. What is the expected value?
$22,000
$8,000
-$8,000
-$32,000

Find the difference (8ab+a+2) - (3ab+6)

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute