A jar contains 10 red marbles and 20 blue marbles. if one red marble is selected and then placed back into the jar, what is the probability of the next marble being a blue marble?

A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. A total of 645 of the 800 who responded were against the tax.

What are the factors of 4800 that add to 20

Seven friends have similar cell phone plans. The price of each plan is $x. Three of the seven friends pay an extra $4 per month for unlimited text messaging. Write and simplify an expression that represents the total cost of the seven plans.

Which of the following describes best defines 4 2/3 a-square root of 16 b-cube root of 4 c - square root of 4 d - cube root of 16

Solve 56 - 10x220 + 8x.

Determine all of the roots (or zeros) 4x^3-4x^2-11x+6=0 if 2 is known to be one of the roots

In a small town there are two main sections called the Hill section and the Lake section. The town has a population of 4298. The number of people who live in the Hill section is 188 more than twice the number of people who live in the Lake section.

Two accounts each begin with a deposit of $5000. Both accounts have rates of 5.7 %, but one account compounds interest once a year while the other account compounds interest continuously.

Blue whales eat an average of 5,000 pounds of fish daily, with a standard deviation of 850 pounds. Approximately what percentage of blue whales eat more than 7,550 pounds of fish? 15.87% 5% 0.3% 0.15%

A car travels 450 miles in the same time that a motorcycle travels 390 miles. if the car's speed is 10 miles per hour more than the motorcycle's, find the speed of the car and the speed of the motorcycle. the speed of the motorcycle is ___ mph.