200 people took part in a study involving a new headache medicine. After one week, the subjects were asked if they had a headache in the past week. According to the data in the
two-way table, what fraction of the people who were given the placebo did not have a
headache?
Given
medicine
Given
placebo
20
Total
30
50
Headache
No headache
120
30
150
Total
150
50
200

Describe at least three examples of how people and wildlife have adapted to their environments in the middle east.

Which layer surrounds the center of the earth? a: crust b: core c: mantle

Altocumulus, altostratus, cirrocumuls, cirrostratus, cirrus, cumulonimbus, cumulus, nimbostratus, stratocumulus, stratus 8.) clouds with tallest vertical development 9.) low altitude clouds in solid layers that produce rain 10.) high altitude thin flat layers of clouds 11.) rain clouds that form under stable atmospheric conditions 12.) middle altitude clouds with globular appearance