3 years ago

Use the formula to evaluate the series 3-9+27-81+...-ae

Mathematics

1 answer:

Anastasy [175]3 years ago

7 0

Answer:

( -4920)

Step-by-step explanation:

we see that the first term is 3 and the common ratio between the succeeding terms is -3. so to solve for the sum of the first 8 terms

Sum = (a1)(1 – r^n) / (1 – r)

and substituting the known terms,we got

Sum = (3)(1 – (-3)^8)/(1 - (-3)) = -4920

Then the answer = ( -4920)

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Hey! Answer to this would be 13/24.

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Kisachek [45]

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3 years ago

Consider that a 1/2 cup serving of 1% cottage cheese is equivalent to 125 grams. If 1 ounce of cottage cheese is equivalent to 2

VikaD [51]

Answer:

4.42 ounces.

Step-by-step explanation:

We have been given that a 1/2 cup serving of 1% cottage cheese is equivalent to 125 grams. 1 ounce of cottage cheese is equivalent to 28.35 grams. We are asked to find the ounces in 1/2 cup serving.

We will use proportions to solve our given problem.

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Upon substituting our given values, we will get:

$\frac{\text{Ounce}}{125}=\frac{1}{28.25}$

$\frac{\text{Ounce}}{125}\times 125=\frac{1}{28.25}\times 125$

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Upon rounding to nearest hundredth, we will get:

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7 0

3 years ago

There were 24 green jelly beans which made up 8%of all the jelly beans in the bag

Zanzabum

There are 300 jelly beans in the bag.

24÷6=4
4×2=8
5×2=10
5×6=30
30×10=300

Proof:
24/300 = ?/100
24×100=2400
2400÷300=8

Hope this helps! :)

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3 years ago