What is the circumference of a circle 4 cm

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?

The lengths of the two sides of a right triangle are 5 inches and 8 inches what is the difference the possible lengths of the third side of the triangle