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How many combination can we get from 3 letters and 4 numbers? IfA customer gives you a $100 bill for a purchase that totals $22.75. What is the best money combination to gi? What is 10^-8.33? What is the z scheme? Help me and tell me which topic this comes from? Given that sin 40° = a, express the following in terms of a. (i) tan 40° (ii) cos 40°?