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شائع Word Problems >

Find the time required for an investment of 5000 dollars to grow to 6800 dollars at an interest rate of 7.5 percent per year, compounded quarterly.

الحلّ

F in d t h e t im e re q u i re d f or an in v es t m e n t o f 5000 d o ll a rs t o g ro w t o 6800 d o ll a rs a t an in t eres t r a t e o f 7.5 p erce n t p er ye a r, co m p o u n d e d q u a r t er l y .

الحلّ

Time : 4.14

خطوات الحلّ

Translate the problem into an equation:

6800 = 5000 (1 + \frac{0.075}{4})^{4 t}

6800 = 5000 (1 + \frac{0.075}{4})^{4 t}, t

حلّ لـ:

t = 4.14

Time : 4.14

أمثلة شائعة

The diameter of a circle is 12 kilometers. What is the circumference?Give the exact answer in simplest form. kilometers five times the sum of a number and fifteen is 50 12% of what number is 360 Tisha deposited 60,000 in a savings account with simple interest. Two years later, she had earned 4,800 in interest. What was the interest rate?The difference between five times a number and five is forty. Find x