13/15 is equivalent to 39 / what

A cross-sectional study involves subjects of different ages true or false

Which of the following artistic professions are often represented among the staff of an advertising agency? A) writers B) illustrators C) musicians D) photographers E) all of the above

Were the red scares a legitimate threat against the American goverment by foreign radicals or an unconstitutional invasion of the government into the lives of its citizens?

nothing lives at the top of Mt. Everest because the altitude is so high. What is the biggest change in climate that occurs as you increase in altitude?

I am a path between high natural masses; remove the first letter to get a path between man-made masses. What am I?

With respect to the earth as a system, the hydrosphere is concerned with: A) air. B) rocks. C) vegetation. D) water.

About how often does a Full Moon happen?

Development begins at birth, true or false

the group that does not recieve the expermental treatment in an experiment is the A.) control group B.) experimental group C.) data D.) varible

Which city is located closest to the equator?