For each pair. of expressions below without substituting in specific values ,determine which of the expressions in the given pairs is larger .explain your reasoning in a sentence or two. 5+t^2 and 3-t^2.
15/×^2+6 and 15/x^2 +7.
(s^2+2) (s^2+1) and (s^2+4)(s^2 +3)
8/k^2+2 and k^2+2

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

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