The height in inches, of a frog jumping off a log can be modeled by the expression -2 t ^ 2 + 12 t + 9 where t is time in seconds. the frog reaches its maximum height at 3 seconds. what is the frogs maximum height?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

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Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?