Voorbeeld 57 Nkosinathi het R6000 belê, en dit het geakkumuleer tot R10 000 oor 3 jare. Bepaal die jaarlikse rentekoers as ' \( n \) persentasie, indien die belegging enkelvoudige rente verdien het. Benader jou antwoord tot een desimale syfer.

anual ¿Cual fue sl capital inicial con el que se hizo el deposit? Tengo un pagare por \( \$ 200000 \) que vence en 40 dias, cuanto dinero obtendria hoy si lo cambio, sab ido que la tasa es del \( 40 \% \) anual

3) Después de 3 años, un banco ha pagado en concepto de inter s's la cantidad de \( \$ \) 840 a una persona por depositar un plazo fijo La tasa de inter's ha sido del \( 2 \% \) anual ¿Cual fue ol capital inicial con el que se hizo el deposi?

\( 1<\begin{array}{l}\text { Suppose someone wants to accumulate } \$ 50,000 \text { for a college fund over the next } 15 \text { years. Determine whether the } \\ \text { following investment plans will allow the person to reach the goal. Assume the compounding and payment periods } \\ \text { are the same. } \\ \text { The person deposits } \$ 80 \text { per month into an account with an APR of } 7 \% \text {. } \\ \text { Will the person meet the goal? Select the correct choice below and fill in the answer box to complete your choice. } \\ \text { (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places } \\ \text { as needed.) } \\ \text { A. No, because the amount that will be in the college fund, } \$ \square \text {, is less than the goal of } \$ 50,000 \text {. } \\ \text { B. Yes, because the amount that will be in the college fund, } \$ \square \text {, is more than the goal of } \$ 50,000 \text {. }\end{array} \).

3. Mika opened a bank account that earns simple interest with an initial deposit of \( \$ 2,200 \). She made no other transactions throughout the year. At the end of the year, Mika had \( \$ 2,260.50 \) in her account. What was the simple interest rate?

A store sells \( Q \) units of a product per year. It costs \( d \) dollars to store one unit for a year. To reorder, there is a fixed cost of b dollars, plus c dollars for each unit. How many times per year should the store reorder, and in what lot size, in order to minimize inventory costs? Use the general solution to find how many times per year a store should reorder, and in what lot size, when \( Q=100, d=\$ 10, b=\$ 20 \), and \( c=\$ 14 \).