Natalie opened a bank account that earns 2.5% simple interest. if her account earned $180 over ten years, how much was natalie's initial deposit when she opened the account?

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The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55