A single search (search âAâ) of a database retrieved a total of 8,734 documents, of which 429 pertain to the topic being studied. Several additional searches on the topic of interest were also conducted and these additional searches plus search âAâ retrieved a total of 12,832 distinct documents, of which 1,987 pertained to the topic of interest. Given all of the above information, with respect to search âAâ, what quantities can be calculated? a. Precision, recall, and relative recall
b. Precision and recall
c. Recall and relative recall
d. Precision and relative recall

answer: blah

explanation:

bc blah

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

d. organisms have cells with different shapes and functions.