Unit Test — Cumulative exam Answers

Which expression is equivalent to cos120°?

Which of the following shows the true solution to the logarithmic equation

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?

Which of the following is a binomial experiment?

What are the domain and range of f(x) = 2(3x)?

The displacement, d, in millimeters of a tuning fork as a function of time, t, in seconds can be modeled with the equation . What is the frequency of the tuning fork?

Which of the following accurately lists all of the discontinuities for the function graphed below?

Which solution finds the value of x in the triangle below?

According to a survey, 15% of city workers take the bus to work. Donatella randomly surveys 10 workers. What is the probability that exactly 6 workers take the bus to work? Round the answer to the nearest thousandth.

In the diagram below, = . What is the value of m?

Which of these shapes have rectangular cross sections when they are cut perpendicular to the base? Select three options.rectangular prismtriangular prismcylinderconesquare pyramidtriangular pyramid

The scores of a high school entrance exam are approximately normally distributed with a given mean = 82.4 and standard deviation = 3.3. What percentage of the scores are between 75.8 and 89?

A supervisor finds the mean number of miles that the employees in a department live from work. He finds and . Which mileage is within a z-score of -1.5?

Law of cosines: a2 = b2 + c2 – 2bccos(A)

Julia is offered a job selling advertising for two different companies. Company A offers a base salary of $30,000 per year plus a year-end bonus equal to 3% of her total sales. Company B offers a base salary of $25,000 per year plus a year-end bonus equal to 5% of her total sales. Which statement best describes the two offers?

The tables show linear functions representing the cost for purchasing different amounts of broccoli and cauliflower.

What is the solution of ?

What is the vertical shift of the graph of the parent cosecant function to the graph of the function below?

What is radians converted to degrees? If necessary, round your answer to the nearest degree.

Marleny is creating a game of chance for her family. She has 5 different colored marbles in a bag: blue, red, yellow, white, and black. She decided that blue is the winning color. If a player chooses any other color, they lose 2 points. How many points should the blue marble be worth for the game to be fair?