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3 years ago

Question one, true or false?

Mathematics

2 answers:

alexdok [17]3 years ago

7 0

Answer:

I think its True but im not sure

Step-by-step explanation:

DiKsa [7]3 years ago

4 0

Answer:

false

Step-by-step explanation:

the value of Q3 is 15

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Evaluate using the finite geometric sum formula

Sever21 [200]

Answer:

$S_9=-18.703$ .

Step-by-step explanation:

The given series is,

$\sum_{i=1}^9(-\frac{1}{2})^{i-1}$

When we substitute $i=1$ , we get the first term, which is $a_1=-28(-\frac{1}{2})^{1-1}$

This implies that,

$a_1=-28(-\frac{1}{2})^{0}$

$a_1=-28(1)=-28$ .

The common ratio is

$r=-\frac{1}{2}$

The finite geometric sum is given by the formula,

$S_n=\frac{a_1(r^n-1)}{r-1} , -1\:$ .

Since there are 9 terms, we find the sum of the first nine terms by putting $n=9$ in to the formula to get,

$S_9=\frac{-28((-\frac{1}{2})^9-1)}{-\frac{1}{2}-1}$ .

$S_9=\frac{-28((-\frac{1}{512})-1)}{-\frac{3}{2}}$ .

$S_9=\frac{-28(-\frac{513}{512})}{-\frac{3}{2}}$ .

$S_9=-28(\frac{171}{256})$ .

$S_9=-\frac{1197}{64}$ .

$S_9=-18.703$ .

The correct answer is B

4 0

3 years ago

Read 2 more answers

Sofia makes and sells stuffed toys. She uses special fabric to cover a foam

valkas [14]

Answer:

384 square cm

Step-by-step explanation:

Fabric used will be equal to the total surface of the cubical block.

$fabric \: used \\ = 6 {side}^{2} \\ = 6 \times {8}^{2} \\ = 6 \times 64 \\ = 384 \: {cm}^{2} \\$

8 0

3 years ago

4.375, 4, 5, 3.75 least to greatest<br><br>

LiRa [457]

Answer:

3.75, 4., 4.375., 5

Step-by-step explanation:

3 0

4 years ago

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In 2002 Wintee Olympics, Cartriona LeMay Doan won the 500-meter race. Her winning time was 74.75 seconds. Find hee average speed

mihalych1998 [28]

74.80 is what it is bcs 5 or more raise the score 4 or under let it lumber

7 0

4 years ago

Please help with my homework. I will give a brainlist out. Only solve 28 please.

lidiya [134]

Answer:

8 games

Step-by-step explanation:

The team has won 13 games so far and needs to win 21.

For this problem, you would solve 21 - 13, which is 8.

8 0

2 years ago

Read 2 more answers