Nicole finished her math assignment in 1/4 hours. Then she completed her chemistry assignment in 1/3 hours. How much more time d
2 answers:
1/3 of an hour (60 minutes) is 20.
1/4 of an hour is 15.
Subtract and receive 5.
So Nicole spent 5 more minutes on her chemistry assignment.
Another way to tackle this problem is to subtract the fractions after finding their common denominator (12)
4/12-3/12=1/12
1/12 of an hour is 5.
I used 2 different methods and I had the exact same answer. Hope it's helpful!
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Answer:
sum = ∑[n=1,5] 4^(n-4)
Step-by-step explanation:
First of all, you need to be able to describe the n-th term.
Here, we have ...
term #: 1, 2, 3, 4, 5
value: 4^-3, 4^-2, 4^-1, 4^0, 4^1
That is, the exponent of 4 is 4 less than the term number. So, the n-th term is 4^(n-4). The sum of the 5 terms shown is then ...