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A gym is 21 years newer than the auditorium. The gym is also one fourth as old as the auditorium. How old is each building? Choices for auditoriums age:26, 27, 28

An electron in a hydrogen atom could undergo any of the transitions listed below, by emitting light. Which transition would give light of the shortest wavelength? n=4 to n=2 n=3 to n=1 n=2 to n=1 n=4 to n=1

In triangle ABC, BC is produced to D. If angle ACD = 110 degree and angle ABC = 70 degree. Find angle BAC. Give reason.

A monopoly firm is faced with the following demand function P = 26 – 0.5Q. The Marginal Cost function for the firm is given by 6 + 6Q and the total fixed cost is 4. Determine a) The profit maximizing output. b) The level of supernormal profit if any. c) T...

In cattle red hair and white hair chromatic and cattle with both white hair and red hair are what

I have calculated by different cheap method and found answer to be correctly as 1.44x10^-4

I don't understand

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