Suppose that a mine is established on a lode deposit that contains ore with 20 times the average proportion of gold to ore. Which one of the following describes the number of days it would take for such an operation, working at the fastest rate described in the passages, to produce 100 metric tons of pure gold?

Each of the following claims appears in the environmental scientist’s passage. For each, select Supported if the scientist cites specific evidence to support the claim. Otherwise select Not supported.

For each of the following statements, select Yes if, according to the information provided, it was accurate at the time the passages were written. Otherwise select No.

For which one of the following questions concerning the time the passages were written does the information provided supply the clearest answer?

For each of the following, select Justified if it is a justified inference on the basis of the information provided. Otherwise select Not justified.

The Grasberg gold mine in Papua Indonesia is the largest gold mine in the world, producing over 57,000 kilograms of pure gold per year. For each of the following, select Implied if the information provided implies that, at the time the passages were written, it was likely true of the Grasberg mine. Otherwise select Not implied.

Assuming each of the following statements is true, select Yes if the statement helps explain trends shown in the second graph in a way that is consistent with information in the passage. Otherwise, select No.

Which one of the following data ranges in the second graph most clearly indicates that the final sentence of the Discussion tab involves oversimplification?

For each of the following statements, select Yes if, based on the information provided in the passage or the first graph or both, the statement would have been true in 2003. Otherwise, select No.

Assume that any increase of 5% or more from one century to the next in the amount of a given food consumed by Barras residents is due primarily to a corresponding increase in imports of that food into Barras from other villages. Given this assumption and the information provided, for each of the following, select Yes if it describes a food likely imported by Barras during times of increased food consumption. Otherwise select No.