nathan and steven stacked boxes on a shelf. nathan lifted 13 boxes and steven lifted 15 boxes. the boxes that nathan lifted each weighed 12 lb more than the boxes steven lifted.
let s represent the weight of the boxes that steven lifted.
what expression represents the total number of pounds nathan lifted?
a. 13(s+12)
b. s + 12
c. 15(s+12)
d. 12(s+13)

The federal reserve controls certain interest rates in the united states. investors often try to speculate as to whether the federal reserve will raise or lower rates and by how much. suppose a company conducts extensive interviews with financial analysts, and as a result, predicts that "thefed" will increase rates by an average of 0.25 percentage points every six months for the forseeable future. which type of equation could be used to model the predicted interest rates over the next several years, assuming no other significant changes? a) a linear equation b) a quadratic equation c) a polynomial equation d) an exponential equation