Henry plans to monitor the change in concentration of an acid during a chemical reaction. he wants to collect data every 0.1 seconds and then to graph his data and insert it into a text document. which pair of tools would be best for henry to use?

The answer is C a computer and a concentration probe i just took the test.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: