Pe^{rt} = Compound interest formula
100e^{30r} = 170
e^{30r} = 17/10
30r = ln (17/10)
r = [ln (17/10)]/30
r = .02 = 2 percent
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Silicon dioxide is dissolvable in water and has a high melting point because the atoms in the dioxide has a strong bond between them, which requires a lot of energy to break them.
