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question:Find x such that log_{64} (3x 2) = frac{1}{3}.

answer:First, convert the logarithmic equation to its exponential equivalent: log_{64} (3x - 2) = -frac{1}{3} This means: 3x - 2 = 64^{-frac{1}{3}} Since 64 = 2^6, you can write: 3x - 2 = (2^6)^{-frac{1}{3}} = 2^{-2} = frac{1}{4} Now solve for x: 3x - 2 = frac{1}{4} 3x = frac{1}{4} + 2 3x = frac{1}{4} + frac{8}{4} = frac{9}{4} x = frac{9}{4} times frac{1}{3} = frac{9}{12} = frac{3}{4} Conclusion: Thus, the solution to the problem is x = boxed{frac{3}{4}}.

question:Valerie has a collection of six lamps of different types in her room, and all of them have burnt out bulbs in various quantities. She needs to buy new light bulbs for each lamp. For Lamp A, she needs 2 small light bulbs; for Lamp B, she needs 3 medium light bulbs; for Lamp C, she needs 1 large light bulb; for Lamp D, she needs 4 extrasmall light bulbs; for Lamp E, she needs 2 large light bulbs; and for Lamp F, she needs 1 small light bulb and 1 medium light bulb. She has a budget of 120 to spend. The prices for each type of light bulb are as follows: Small light bulbs cost 8.75 each. Medium light bulbs cost 11.25 each. Large light bulbs cost 15.50 each. Extrasmall light bulbs cost 6.10 each. How much money will Valerie have left over after buying all the light bulbs she needs?

answer:First, let's calculate the total cost for each type of light bulb Valerie needs to buy: For Lamp A: 2 small light bulbs at 8.75 each = 2 * 8.75 = 17.50 For Lamp B: 3 medium light bulbs at 11.25 each = 3 * 11.25 = 33.75 For Lamp C: 1 large light bulb at 15.50 each = 1 * 15.50 = 15.50 For Lamp D: 4 extra-small light bulbs at 6.10 each = 4 * 6.10 = 24.40 For Lamp E: 2 large light bulbs at 15.50 each = 2 * 15.50 = 31.00 For Lamp F: 1 small light bulb at 8.75 each and 1 medium light bulb at 11.25 each = 8.75 + 11.25 = 20.00 Now, let's add up the total cost for all the light bulbs: Total cost = 17.50 (Lamp A) + 33.75 (Lamp B) + 15.50 (Lamp C) + 24.40 (Lamp D) + 31.00 (Lamp E) + 20.00 (Lamp F) Total cost = 142.15 Since Valerie has a budget of 120, she will not have enough money to buy all the light bulbs she needs. She will be short by 142.15 - 120 = boxed{22.15} .

question:Let p be a prime number. We construct a directed graph of p vertices, labeled with integers from 0 to p1 . There is an edge from vertex x to vertex y if and only if x^2+1equiv y pmod{p} . Let f(p) denotes the length of the longest directed cycle in this graph. Prove that f(p) can attain arbitrarily large values.

answer:1. **Define the polynomial and sequence:** Let ( P(x) = x^2 + 1 ). Define the sequence ( a_i = P^i(0) ) for all ( i geq 1 ). This means: [ a_1 = P(0) = 0^2 + 1 = 1 ] [ a_2 = P(a_1) = P(1) = 1^2 + 1 = 2 ] [ a_3 = P(a_2) = P(2) = 2^2 + 1 = 5 ] and so on. 2. **Inductive growth of the sequence:** We observe that ( a_{n+1} > a_n ) for all ( n geq 1 ). By induction, we can show that ( a_{n+1} > a_n^2 > a_1 a_2 ldots a_n ) for all ( n geq 2 ). 3. **Existence of a prime divisor:** Fix a positive integer ( n ). We need to show that there exists a prime divisor ( p ) of ( a_n ) that does not divide any of the previous ( a_i ) for ( i < n ). This implies that there is a cycle of length ( n ) for that prime ( p ). 4. **Prime divisor properties:** There exists a prime ( p ) such that ( nu_p(a_n) > nu_p(a_1 a_2 ldots a_{n-1}) ). Suppose otherwise, and let ( p mid P^k(0) ) where ( k ) is minimal. Then ( k mid n ). 5. **Valuation of the sequence:** We will show that ( nu_p(a_{mk}) = nu_p(a_k) ) for all positive integers ( m ), which will contradict the choice of ( p ). Observe that the polynomial ( P^{mk}(x) ) does not have an ( x^1 ) term, so: [ nu_p(P^{(m+1)k}(0)) = nu_p(P^{mk}(a_k)) = min(nu_p(P^{mk}(0)), 2nu_p(a_k)) ] For ( m = 1 ), it is ( nu_p(a_k) ), and for ( m geq 2 ), by induction, it remains the same. Thus, we have a contradiction. 6. **Conclusion:** Since we can always find such a prime ( p ) for any ( n ), it implies that ( f(p) ) can attain arbitrarily large values. (blacksquare)

question:A bug starts crawling from 3 on a number line, moves left to 8 before turning around and crawling towards 7. However, the bug stops at 2 to take a rest before continuing. Calculate the total distance the bug crawls. textbf{(A)} 18quadtextbf{(B)} 20quadtextbf{(C)} 22quadtextbf{(D)} 24quadtextbf{(E)} 26

answer:1. **Calculate the distance from -3 to -8**: [ |-8 - (-3)| = |-8 + 3| = |-5| = 5 text{ units} ] 2. **Calculate the distance from -8 to 2**: [ |2 - (-8)| = |2 + 8| = |10| = 10 text{ units} ] 3. **Calculate the distance from 2 to 7**: [ |7 - 2| = |5| = 5 text{ units} ] 4. **Add all distances for the total distance**: [ 5 text{ units} + 10 text{ units} + 5 text{ units} = 20 text{ units} ] The total distance the bug crawls is 20 text{ units}. The correct answer is boxed{textbf{(B)} 20}.

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