3 years ago

Can you guy help me how to solve the mole problem

Mathematics

1 answer:

ioda3 years ago

8 0

I can’t see the problem?

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Can someone help me with this?

Anna35 [415]

Answer:

Let 'a' be the first term, 'r' be the common ratio and 'n' be the number of terms

Series = 2+6+18.......= 2+2•3¹+ 2•3².......= 728

Now,

$Sum = \frac{a( {r}^{n} - 1) }{(r - 1)} \\$

So,

$\frac{a( {r}^{n} - 1)}{(r - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{(3 - 1)} = 728 \\ \frac{2( {3}^{n} - 1) }{2} = 728 \\ {3}^{n} - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n} = 729 \\ {3}^{n} = {3}^{6} \\ \boxed{ n = 6}$

Therefore, number of terms is 6

6 is the right answer.

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3 years ago

The line graph with gradient 2 and y-intercept(0,5)

Varvara68 [4.7K]

Answer:

The line graph is:

y=2x+5

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2 years ago

Tony is a medical sales representative. His company has set a goal for him to sell 4,200 bottles of a new medicine in 3 months i

BlackZzzverrR [31]

That answer would be 4,200/3=1,400

5 0

3 years ago

What is the equivalent exponential form of the fourth root of x?

mart [117]

I hope this helps you

7 0

3 years ago

Need answer ASAP <br> *MARKING BRAINLIEST

Luba_88 [7]

Answer:

252 in²

Step-by-step explanation:

Recall area of regular polygon is A= (1/2)*(perimeter)*(apothem)

Area = (1/2)*(63)*(7)

= 252 in²

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3 years ago

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