- If log a= 0.4262, find log √a?

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Calculate the concentration of barium in the solution at equilibrium when 15.0 mL of 0.200 M K2CrO4 is added to 25.0 mL of 0.100 M BaCl2.? How many negative roots does the equation 3x^4 - 2x^3 + 8x^2 - x- 7 = 0 have? Is y^2=7x a function. Please explain? How to show that for each integer n≥0, 1+10^(231+462n) is divisible by the squares of at least two different primes? Integrate dx/cos^2 (x)?