Maximo is helping a librarian return books to the shelves where they belong. He picks up books from the librarian's desk. as shown in Figure A. He then carries
them to the shelves, as shown in Figure B. In which figure does Colin do work?
Direction of
movement
Direction of
movement
A. Lifting books
B. Carrying books
Figure A
Hi

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)