at what rate of annual simple interest acertain sum will amount to four times in 15 years?
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so time is 15 years
let the principal be A
A(1+r)¹⁵=4A
(1+r)¹⁵=4
![\sqrt[15]{4}=1.0968249796946259606814717780288](https://tex.z-dn.net/?f=+%5Csqrt%5B15%5D%7B4%7D%3D1.0968249796946259606814717780288 "\sqrt[15]{4}=1.0968249796946259606814717780288")
so 1+r=1.0968249796946259606814717780288
r=0.0968249796946259606814717780288
so rate percent is 9.68249796946259606814717780288%
let the principal be A
A(1+r)¹⁵=4A
(1+r)¹⁵=4
so 1+r=1.0968249796946259606814717780288
r=0.0968249796946259606814717780288
so rate percent is 9.68249796946259606814717780288%
idhimoh21:
options r 15, 17.5% , 20% r 25%
well we have to do manually then
I used calculator
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