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bixtya [17]
3 years ago
7

Which coupon will save Estelle more money on a microwave originally priced at $245.80?

Mathematics
2 answers:
algol [13]3 years ago
7 0
What are the coupons
gavmur [86]3 years ago
4 0

Answer: lemme solve it ty

Step-by-step explanation:

hi

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The lengths of songs on the radio are normally distributed with a mean length of 210 seconds, If 38.2% of all songs have lengths
gladu [14]
 i think the answer is 16 seconds                                                        
8 0
3 years ago
Find the sum of the geometric series 512+256+ . . .+4
mario62 [17]

\bf 512~~,~~\stackrel{512\cdot \frac{1}{2}}{256}~~,~~...4

so, as you can see above, the common ratio r = 1/2, now, what term is +4 anyway?

\bf n^{th}\textit{ term of a geometric sequence}\\\\a_n=a_1\cdot r^{n-1}\qquad \begin{cases}n=n^{th}\ term\\a_1=\textit{first term's value}\\r=\textit{common ratio}\\----------\\r=\frac{1}{2}\\a_1=512\\a_n=+4\end{cases}

\bf 4=512\left( \cfrac{1}{2} \right)^{n-1}\implies \cfrac{4}{512}=\left( \cfrac{1}{2} \right)^{n-1}\\\\\\\cfrac{1}{128}=\left( \cfrac{1}{2} \right)^{n-1}\implies \cfrac{1}{2^7}=\left( \cfrac{1}{2} \right)^{n-1}\implies 2^{-7}=\left( 2^{-1}\right)^{n-1}\\\\\\(2^{-1})^7=(2^{-1})^{n-1}\implies 7=n-1\implies \boxed{8=n}

so is the 8th term, then, let's find the Sum of the first 8 terms.

\bf \qquad \qquad \textit{sum of a finite geometric sequence}\\\\S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad \begin{cases}n=n^{th}\ term\\a_1=\textit{first term's value}\\r=\textit{common ratio}\\----------\\r=\frac{1}{2}\\a_1=512\\n=8\end{cases}

\bf S_8=512\left[ \cfrac{1-\left( \frac{1}{2} \right)^8}{1-\frac{1}{2}} \right]\implies S_8=512\left(\cfrac{1-\frac{1}{256}}{\frac{1}{2}}  \right)\implies S_8=512\left(\cfrac{\frac{255}{256}}{\frac{1}{2}}  \right)\\\\\\S_8=512\cdot \cfrac{255}{128}\implies S_8=1020

7 0
3 years ago
Been trying at this can't please help lol
xz_007 [3.2K]

To add or sum this arrary, beg ∈ {array} {r} 37 \202\ + 160/ ∈  end {array} gives <u>A) 399</u>.

<h3>What is an array?</h3>

An array is a data structure made up of some elements.

The sum of all elements in an array is found by adding up the elements in the array.

<h3>Data and Calculations:</h3>

Elements of the array = 37, 202, and 160

The sum of the array, 37 + 202 + 160 = 399

Thus, to add or sum this arrary, beg ∈ {array} {r} 37 \202\ + 160/ ∈  end {array} gives <u>A) 399</u>.

Learn more about arrays at brainly.com/question/23698059

#SPJ1

<h3>Question:</h3>

Add beg ∈ {array} {r} 37 \202\ + 160/ ∈  end {array}

<h3>Answer Options:</h3>

A) 399

B) 389

C) 400

D) 409

4 0
1 year ago
What is the slope of the graph of y= 18x + 6
NeX [460]

Answer:

18

Step-by-step explanation:

y=mx + b

m is the slope.

Therefore, 18 should be the slope

7 0
3 years ago
Steven combines 7.49 liters of red paint with 6.26 liters of blue paint to make purple paint. He pours the paint equally into 4
kondaur [170]

Answer:

3.3075 liters of paint

Step-by-step explanation:

7.40 (red paint) + 6.26 (blue paint ) = 13.66 (purple paint)

He pours 13.66 liters of purple paint equally into 4 containers and has 0.43 liters left.

x + x + x + x = 13.66 - 0.43

4x = 13.23

x = 13.23/4

x = 3.3075

6 0
3 years ago
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