URGENT !!
Really need answers with the work shown. plss help

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Two consecutive negative integers have a product of 30. what are the integers?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?