Derek is writing a report on cell phone usage. He collects data from a random sample of seventh graders in his school, and finds that 16 out of 20 seventh graders have cell phones. If there are 290 seventh graders in his school, estimate the number of seventh graders that have cell phones.

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