Bradley completed 3/5 of his homework. What percent of his homework does he still need to complete?

2 answers:

8 0

5/5 = 100% of his homework correct? SO...

Take 100 / 5. This is 20. each question is 20% of his homework. So multiply 3 x 20 (since he has only completed 3) this is 60.

Now take 100 (the total) and take 60 (the number he has completed) to get your total.

Total = 40... so 40%

makes sense?

muminat3 years ago

7 0

3/5 = 6/10 (which is 60%) 100% - 60% = 40%

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$a_{n} = a_{1} \cdot r^{(n - 1)}$

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r = ratio = 0.5

Substituting the numbers, we have:

$a_{n} = 4 \cdot (\frac{1}{2})^{n-1}$

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This is an exponential function with base less than 1. Therefore, we can exclude graph C (which depicts a linear function), and graphs A and D (which depict an exponential function with base greater than 1).

In order to choose between graph B and E, let's evaluate the function in two different points:

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