The is usually a good choice to represent a whole data set as a single number. a. mean b. mode c. range d. median

The answer is c

Explanation: The mean is usually a good choice to represent a whole data set as a single number.

Mean is derived by adding a whole data and dividing the data by the number of points. It can also be referred to as the average that is used to derive the central tendency of data. It also measures the central tendency in a data set. It can be called an average.

compost can be added to topsoil as a:

pesticide

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.