How do you solve 4=2^x?

Issac has 21 marbles and 7 blue marbles he wants to place them in identical group without any marbles left what is the greatest number of group Isaac can make?

Write number in two other forms 40,000+1,000+300+70+8

Michelle has a bag with marbles in it. Some of the marbles are blue, some are green, and some are yellow. She draws one marble at random, records the color, and returns it to the bag.

We toss two coins and observe the upper faces of the coins. a. observe at least one head b. observe at least one tail what is the probability that both a and b occur? what is the probability that a or b or both events occur?

In 1940 the life expectancy at birth in the general public was 62.9 years. By 1980, it had risen to 73.7 years. Assuming a linear relation, which is the best prediction of life expectancy in the year 2000?

In the spring, you charge people $7 for going to their house to water flowers, then $4 for every hour you water. If you make $27 one day, how many hours did you spend watering?

Sophia spent 6,274 rand on her trip. she exchanged the rand she had left for u. s. Dollars. The exchange rate was 1 rand to$0.14. How many u. s. Dollars did sophia get? Support your answer using specific information from the problem.

Is 15,36,39 a Pythagorean triple

A crate full of oranges weighed 15 lb.

The height of a golf ball in the air can be modeled by the equation, where h is the height in the feet of the ball after t seconds. a. how long is the ball in the air?