nidiavega2009
19.07.2019 •
Mathematics
You are saving for a bicycle that costs $120. you deposit $75 in an account that earns compounded annually. the expression 75(1+r)^2 represents the balance after 2 years the annual interest rate in decimal form. a. write a polynomial that represents the balance of your account. b. what is the balance of your account when the interest rate is 10%. c. how much more money do you need to buy the bicycle?
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Ответ:
Use this pythagoreom theorem which is a^2 + b^2 =c^2 so for this case it would be 2^2 + b^2 = 4^2 which is 4+b^2 =16 then its b^2 = 12 because you minus 4 from each side, and your answer is the square root of 12
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