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3 years ago

Dan earns ?9.10 per hour. How much will he earn for 5 hours work?

Mathematics

1 answer:

wlad13 [49]3 years ago

8 0

Answer:

45.5, do 9.10*5 :)

Step-by-step explanation:

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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

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

max2010maxim [7]

Answer: 50% chance that a randomly chosen student will be a boy

3 0

4 years ago

Read 2 more answers

4a + 6b= 10 2a - 4b =12 what does 12a=

mixer [17]

4a + 6b = 10
2a - 4b = 12...multiply by -2
----------------
4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
------------------add
14b = - 14
b = -14/14
b = -1

2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4

so 12a = 12(4) = 48 <==

3 0

4 years ago

Choose a number with 2434 > your number > 19

Gekata [30.6K]

I think the answer is 2434 > <span>1839555 > 19</span>

5 0

4 years ago

15x+3y=-2 in slope-intercept form

Airida [17]

Answer:

Y=-5x-2/3

Step-by-step explanation: