1. In a biology experiment the number of yeast cells is determined after 24 hours of growth at different temperatures.
a) Identify the independent and dependent variables in the experiment.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

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.)