Karla invested \( \$ 1,000 \) in savings bonds. If the bonds earn \( 6.75 \% \) interest compounded semi annually, how much total will Karla earn in 15 years?

2. De que forma o uso das rendas financeiras pode auxiliar aos gestores na decisão de investimento ou financiamento? TE III: Múltipla escolha \( (\mathbf{3 , 0} \) )

Determine the present value \( P \) that must be invested to have the future value \( A \) at simple interest rate \( r \) after time \( t \). \( A=\$ 7000, r=4.5 \%, t=4 \) years

Marvin pays \( £ 800 \) for 240 scarves. He sold of the scarves for \( £ 9 \) each. He sold the rest of the scarves for \( £ 4 \) each. Work out how much profit Marvin made from selling the scarves.

Peter puts \( \$ 100.00 \) into an account to use for school expenses. The account earns \( 15 \% \) interest, compounded annually. How much will be in the account after 7 years? Use the formula \( A=P\left(1+\frac{r}{n}\right)^{n t} \), where \( A \) is the balance (final amount), \( P \) is the principal

Using the interest formula \( A=P(1+r) \), solve for the indicated variable. Solve for \( t \).