Sally is making sun tea. Every hour the concentration of the tea doubles. If it takes 6 hours for the tea to be ready how long would it take the tea to reach half of the final concentration?

What is 12 times13 without using a calculator

A bag contains 6 red marbles, 6 purple marbles, and 6 yellow marbles. What is the probability of randomly selecting a yellow marble from the bag? A) 1 / 12 B) 1 / 6 C) 1 / 3 D) 1 / 2

A cyclist can cover a distance of 18 miles in 45 minute. How many miles the cyclist can cover in 6 hours?

Suppose that events a and b are mutually exclusive with p (a) = ½ and p (b) = ⅓. a. are a and b independent events? explain how you know.

Select the correct answer Mark transferred songs from his computer onto his portable music player. He transferred 27 songs in 15 minutes. How many songs did he transfer per minute

The side lengths of triangle RST are 5, 12, and 13. Which set of ordered pairs form a triangle that is congruent to triangle RST?

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