Carlos and maria drove a total of 191 miles in 3.8 hours. carlos drove the first part of the trip and averaged 49 miles per hour. maria drove the remainder of the trip and averaged 52 miles per hour. for approximately how many hours did maria drive? round your answer to the nearest tenth if necessary.

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?

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.