Can this expression be simplified anymore?

Find the domain of the following expression: 1/(√x)-2

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)