Cumulative Exam — Cumulative exam Answers

Which trigonometric functions have a domain of [–1, 1]?

Which graph includes a function, its inverse, and a dashed line that verifies the relationship?

What is 4cos2(165°) – 2 expressed as a single trigonometric function?

The values in the table represent the graph of a continuous function. Which interval must contain an x-intercept?xy–3.1–1.85–2.7–0.84–2.3–0.09–1.90.44–1.50.79–1.11.00–0.71.10–0.31.130.11.13

What is the value of x in ?

What is the approximate value of a local maximum for the polynomial?

If a polynomial function f(x) has roots and –6, what must be a factor of f(x)?

What is the third term in the binomial expansion of (3x + y3)4?

The amount of a sample remaining after t days is given by the equation , where A is the initial amount of the sample and h is the half-life, in days, of the substance. A sample contains 18% of its original amount of Radon-222. The half-life of Radon-222 is about 3.8 days. Which is the best estimate for the age of the sample?