3 years ago

Evaluate 12 sigma n=3 20(0.5)^n-1 9.99 19.95 29.98 39.96

Mathematics

2 answers:

posledela3 years ago

3 0

Answer:

We have a geometric series in which:

a = 20

r = 1/2

Now, we know that: S2 = 20(1-r^2)/(1-r) and S12 = 20(1-r^12)/1-r

Therefore: sigma(3,12) = S12-S2 = 20[(1-r^12)/(1-r) - (1-r^2)/(1-r)] =5115/512 = 9.99023438

Therefore, the answer is: 9.99

Ilya [14]3 years ago

3 0

Answer: Is D

Step-by-step explanation:

You might be interested in

Sum1 help<br> me!!!!!!!!!!!

dem82 [27]

The answer is 13!!!! b

7 0

3 years ago

Read 2 more answers

Can anyone please help

lilavasa [31]

Answer:

Adult tickets = $73.5

Child tickets = $20.5

Step-by-step explanation:

${ \rm{3x + 5y = 50 - - - \{eqn \: 1 \}}} \\ { \rm{x + 5y = 31 - - - \{eqn \: 2 \}}} \\$

• Subtract eqn 2 from eqn 1:

${ \rm{2x = 21}} \\ { \rm{x = 10.5}}$

${ \rm{10.5 + 5y = 31}} \\ { \rm{5y = 20.5}} \\ { \rm{y = 4.1}}$

3 0

2 years ago

Choose the best unit of measure to find the capacity of a swimming pool.

Nady [450]

Kiloliters.Hope I helped.

4 0

4 years ago

Which is the graph of an odd monomial function?

Minchanka [31]

Odd function must pass through origin so first two options are not correct.

Odd function must be rotational symmetry around origin. So last option is not correct.

So answer is C.

6 0

4 years ago

Plz help me well mark brainliest if correct........?

grigory [225]

Answer:

can u retake the photo i cant see whole shapes ill answer the question when u post the new one

Step-by-step explanation:

7 0

3 years ago