- Calcium carbonate is an insoluble salt True or False?

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What's the point of the double angle formula in trig? Put the following equations into an augmented matrices form:
5x + 8y = 15
2x – 4y = 5? Find the length of the parametric curve:
x=1+12t^2
y=5+8t^3 0≤t≤2. I found 8(sqrt(10)-1) but is it false help please? Find the exact value of the equation in the interval [0, 2pi) 4sin(x)Cos(x)=1? Molar mass of Radon if mercury vapor diffuses 1.082 times as fast as radon gas? Assume that Graham's law holds for diffusion.?