How to use numbers and symbols to represent mathematical ideas

In the year 2003, there were approximately 600 million TVs in use and it was projected that the amount of TVs would increase at a rate of 20% each year.

In 3 years, 25% of a radioactive element decays. What's it's half-life?

A special rectangular bathtub measures 132 cm long, 70 cm wide, and 40 cm high. How many cm3 of water are needed to fill the tub 3/4 full?

What is a reasonable height for a 5-story building?

7/4 * 9/10 faction in simplest form

What is the word form for 13,406

Which expression has a value that is equivalent to 5n + 13 when n = - 5 I think its 4n + 8?! I'm not shure tho A. n² + 13 B. 4n + 8 C. 2n + 2 D. n + 8

Shirley is drawing triangles that have the same area. the base of each triangle inversely with the heigh. what are the possible base and height of a second triangle if the first triangles base is 12 and its height is 8. select one: a. 120 and 80 b.

45x - 15 Factor out the gcf of the following expression

Molly says that 4/8 is always the same 1/2. Andrew says that 4/8 and 1/2 are equivalent fractions, but they could be different amounts.