4× (1,351 - 381) which of the following is true about the expression above? a. the given expression is 4 less than (1,351 - 381). b. the given expression is 4 times smaller than (1,351 - 381). c. the given expression is 4 times as large as (1,351 - 381). d. the given expression is 4 more than (1,351 - 381).

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.