### Problem

Joane bought 3 1/2 Lbs of strawberries on Monday. Her family ate 1 2/3 Lbs on Tuesday. How many pounds were left on Wednesday?

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Joane bought 3 1/2 Lbs of strawberries on Monday. Her family ate 1 2/3 Lbs on Tuesday. How many pounds were left on Wednesday?

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Tn = a+(n -1)d sn = n/2(a + n) 4. For the series 3 + 9 + 15 + 21... Find: a) an expression for tn b) an expression for sn c) the answer if s = 20 d) the answer if t = 115 5. Find the # of terms in the sequencece 2,6,10... 626 I need a step by step procedure for solving these problems.

2. Apply the proof of the irrationality of sqrt(2) to a) sqrt(3) and b) sqrt(4). If the proof breaks down, indicate precisely why. 3. Euler's phi-function is defined such that for n > 0, phi(n) = |{m < n: gcd(m,n)=1}|. So, e.g., phi(4) = |{1,3}| = 2; phi(5) = |{1,2,3,4}| = 4. a. Show that for prime p, phi(p) = p-1.