Problem $5\mathrm{.}13($Time for a Lump Sum to Double$)$

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How long will it take $$700$ to double if it earns the following rates? Compounding occurs once a year. Round your answers to two decimal places.

a$.4\%.$

year$($s$)$

b$.11\%.$

year$($s$)$

c$.20\%.$

year$($s$)$

d$.100\%.$

year$($s$)$