Matt, Erin, and Lauren were having a challenge to see who could dissolve a one-pound cube of sugar the quickest.
Matt puts his sugar cube in a bucket of water and stirs it with a wooden spoon. Erin heats up the water before putting it into her bucket and uses a wood spoon to stir it.
What must Lauren do to make her sugar cube dissolve quicker than Matt and Erin?
A) Place the sugar cube into a bucket of cold water and stir really, really fast.
B) Place the sugar cube into a bucket of hotter water and stir slower than Matt and Erin.
C) Get a smaller container with less water and put the sugar cube in it and shake it.
D) Break the sugar cube into smaller pieces, put into hot water and stir it.

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

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.)

What is the measurement of how fast an object moves relative to a reference point?