Sam has 50$ in an account that earns 5% interest compounded annually. To the nearest cent, how much interest will he earn in 3 years? Use the formula B=p(1+r)t, where B is the balance (final amount), p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years. $____
Q. Sam has 50$ in an account that earns 5% interest compounded annually. To the nearest cent, how much interest will he earn in 3 years? Use the formula B=p(1+r)t, where B is the balance (final amount), p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years. $____
Identify values for formula: Question_prompt: How much interest will Sam earn in 3 years on $50 with 5% annual compound interest?
Plug values into formula: Step 1: Identify the values for the formula B=p(1+r)t. Here, p=$50, r=5% or 0.05 as a decimal, and t=3 years.
Calculate balance after 3 years: Step 2: Plug the values into the formula to calculate the balance after 3 years. B=50(1+0.05)3.
Calculate (1+0.05)3: Step 3: Calculate (1+0.05)3. This is 1.053.
Find 1.053: Step 4: Use a calculator to find 1.053. The result is 1.157625.
Multiply principal by result: Step 5: Multiply the principal amount by the result from Step 4. B=50×1.157625.
Find balance: Step 6: Perform the multiplication to find the balance. $B = \$\(57\).\(88125\).
Subtract original principal: Step \(7\): To find the interest earned, subtract the original principal from the balance. \(Interest = B - p\). \(Interest = 57.88125 - 50\).