The kelvin temperature of an object is t1 and the object radiates a certain amount of energy per second. the kelvin temperature of the object is then increased to t2, and the object radiates 31 times as much energy per second as it radiated at the lower temperature. what is the ratio t2/t1?

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In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).