Question 1202269
r
r = 7/100
r = 0.07 per year,

P= 10000
Thecompound interest formula
n=?



A = P(1 + r/n)^nt

t = ln(A/P) / n[ln(1 + r/n)]

plug in the data and simplify

t = ln(20000/10000)) / ( 1 * (ln(1 + 0.07)) )


t = ln(20,000.00/10,000.00) / ( 1 × [ln(1 + 0.07)] )
t = 10.245 years

Round off as required