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morpeh [17]
3 years ago
8

Suppose the population of a certain city is 3987 thousand. It is expected to decrease to 3157 thousand in 50 years. Find the per

cent decrease.
Mathematics
1 answer:
Natalija [7]3 years ago
7 0
Oh you just gotta like multipley and then subtracted it
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Help me please I dont understand
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How do u express one-half of the difference of a number cubed and one?
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How many different ways are there to choose a subset of the set {1,2,3,4,5,6} so that the product of the members of the subset i
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You have to pick at least one even factor from the set to make an even product.

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\displaystyle \sum_{e=1}^3 \binom 3e \sum_{o=0}^3 \binom 3o = 2^3 \sum_{e=1}^3 \binom3e = 8 \left(\sum_{e=0}^3 \binom3e - \binom30\right) = 8(2^3 - 1) = \boxed{56}

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