During which time period did the placental mammals appear on earth?

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During the Paleocene and Eocene epochs, 70 to 40 million years ago, placental mammals evolved, dispersed,
and adapted to new environments

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Explained what an electrolyte is for a battery

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What is the AHRI "A" performance testing condition for air-cooled air-conditioning equipment?

A) 95°F outside ambient, 75°F indoor dry bulb, 75°F indoor wet bulb B) 95°F outside ambient, 80°F indoor dry bulb, 67°F indoor wet bulb C) 100°F outside ambient, 75°F indoor dry bulb, 72°F indoor wet bulb D) 90°F outside ambient, 85°F indoor dry bulb, 70°F indoor wet bulb

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Differentiate between active and passive immunity

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Needco Supplies-Canada employee Stella Needleson was asked to determine if the current process of dying writing paper should be retained or a new, environment friendly process should be implemented. Estimates or actual values for the two processes are summarized below. She performed an after-tax replacement analysis at 10% per year and the corporation’s effective tax rate of 32% to determine that economically, the new process should be chosen. Was she correct? Why or why not? (Note: Canadian tax law does not impose the half-year convention requirement. Monetary units are in Canadian dollars.)

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