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인기 있는 Word Problems >

Denise opened a savings account 3 years ago. The account earns 5% interest, compounded continuously. If the current balance is 800.00, how much did she deposit initially?

해법

De ni se o p e n e d a s a v in g s a cco u n t 3 ye a rs a g o . T h e a cco u n t e a r n s 5% in t eres t, co m p o u n d e d co n t in u o u s l y . I f t h e c u rre n t ba l an ce i s 800.00, h o w m u c h d i d s h e d e p os i t ini t ia ll y ?

해법

Principal : 688.57

솔루션 단계

Translate the problem into an equation:

800 = P e^{0.05 \cdot 3}

P

해결 대상

, 800 = P e^{0.05 \cdot 3} : P = 688.57

Principal : 688.57

인기 있는 예

9 less than twice a number Rick ran for 3/4 hour on Wednesday for a 거리 of 4.2 miles. On Thursday, he ran for 1 hour at the same speed he ran on Wednesday. How many miles did Rick run on Thursday?The radius of a 원형 is 19 m. Find its area in terms of find all the pairs of consecutive odd natural numbers, both of which are larger than 10,such that their sum is less than 40 Mark deposited 10,000.00 into a new savings account that earns interest compounded annually. After 10 years, the balance in the account was 21,947.00. What was the interest rate on the account?