Sandy was given the following series of observations. Which represents a theory?

The turtle population on an island is declining at a rate of 1.4% per year. The population was 3800 in the year 2009. Which answer is the best prediction of the population in the year 2014?

What is 2/3 of 3/7 ...

Mrs. Rivera has bars of chocolate in a box. The total mass of bars of chocolate in the box is 3 kilograms. What is the mass in grams

It takes Gaby only a few hours to read a long book. Which is the dependent variable in this situation? A. Minutes Spent Reading B. Name Of Book C. Number of Pages Read D. Time of Day she reads

This system of equations has an infinite number of solutions. Define the solutions algebraically, and allow z to represent all real numbers. 3x - 4y + 4z = 7 x - y - 2z = 2 2x - 3y + 6z = 5

Write an inequality that represents the description and then solve. Dave has $15 to spend on an $8 book and two birthday cards (C) for his friends. How much can he spend on each card if he buys the same card for each friend?

How many terms are in the arithmetic sequence - 27, - 16, - 5, ..., 292? Hint: a_n=a_1+d (n-1), where a_1 is the first term and d is the common difference

Rachel invested $15,000 in a nine-year CD giving 8.5% interest, but needed to withdraw $4,000 after two years.

What temperature is equivalent to 373 k? a. 0 °c b. 50 °c c. 100 °c d. 373 °c

A test has a mean of 65 with standard deviation of 5. What percent of the students would you expect to receive a grade of 55 or more? a. 2.5% b. 95% c. 13.5% d. 97.5% e. none of the above