What is a placebo and why is it important in an experiment to test the effectiveness of a drug

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.