Dennis put $59 into a cd that pays 2.1% interest. according to the rule of 72,
approximately how long will it take for his money to double?
o
o
a. 281.0 years
b. 34.3 years
o
c. 28.1 years
o
d. 342.9 years
submit

Rule of 72 is (72/interest%), so we do
(72/2.1%)=34.3

the answer is B

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.