Adele is buying a sport utility vehicle. she is trying to choose among a variety of options. brand: brand a or brand b transmission: 4-speed standard, 5-speed standard, or automatic bumper: steel, vinyl, or 2x4 boards roof: hard top or convertible top adele calculates that she has 2 + 3 + 3 + 2, or a total of 10, possible vehicle choices

what is adele’s error? she should have added only the transmission and bumper choices. she should have added only the brand and roof choices. she should have multiplied the total of all the choices. she should have multiplied only the brand and roof choices.

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?