when 1 is added to a number and the answer is trebled , it gives the same result as doubling the number and then adding 4, find
1 answer:
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Answer:
Katherine invested $12,000
Step-by-step explanation:
Use formula
where
I = interest,
P = principal,
r = rate (as decimal),
t = time (in years).
In your case,
t = 1 year,
r = 0.06 (or 6%)
P + I =$12,720, thus
