At the library, Herb spent hour looking for a book, 1 hour reading, and į hour doing research on the computer. How many
hours did Herb spend at the library?

3 hours obviously

Step-by-step explanation:

1 hour looking for a book, 1 hour reading it, and one hour doing research on the book = 3 hours

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b