Ask question

Ask question

All categories

3 years ago

10

Which formula(s) can be used to find the nth partial sum of a geometric sequence or the sum of the first n terms of a geometric

series?

1 answer:

ivolga24 [154]3 years ago

6 0

Step-by-step explanation:

An=A1. R raised to the power n-1

You might be interested in

If x and (19x+30) are the measures of complementary angles, what is the measure of each angle?

Alisiya [41]

Answer:

3° and 87°

Step-by-step explanation:

<em>here's</em><em> your</em><em> </em><em>solution</em>

<em> </em><em>=</em><em>></em><em> </em> we know that measure of complementary angle is 90°

=>. one angle is. = x

=> other angle is .= (19x + 30)

=> so, x + 19x + 30° = 90°

=> 20x + 30° = 90°

=> 20x = 60°

=> x = 60/20

=> x = 3°

hence one angle is 3° and other is 87°

hope it helps

7 0

3 years ago

Find the 59th term of the following arithmetic sequence. 15, 23, 31, 39

m_a_m_a [10]

$15~~,~~\stackrel{15+8}{23}~~,~~\stackrel{23+8}{31}~~,~~\stackrel{31+8}{39}~~,~~...~\hspace{10em}\stackrel{common~difference}{d=8} \\\\[-0.35em] ~\dotfill\\\\ n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} a_n=n^{th}\ term\\ n=\stackrel{\textit{term position}}{59}\\ a_1=\stackrel{\textit{first term}}{15}\\ d=\stackrel{\textit{common difference}}{8} \end{cases} \\\\\\ a_{59}=15+(59-1)8\implies a_{59}=15+472-8\implies a_{59}=479$

4 0

3 years ago

Find a number whose 6 1/4% is 12

Pachacha [2.7K]

Answer: The number is 192

Step-by-step explanation:

8 0

3 years ago

All athletes at the Olympic games are tested for performance-enhancing steroid drug use. The imperfect test gives positive resul

Nana76 [90]

Answer:

0.4%

Step-by-step explanation:

We have two independent events

The athlete who is being tested for drugs actually is using steroids.
The test went wrong indicating a false result.

The probability of 1) to happen is 0.04 because "4% of all registered athletes use steroids".

The probability of 2) ti happen is 0.1 because "The imperfect test gives positive results (indicating drug use) for 90% of all steroid-users"

Then the probability of 1) and 2) to happen is given by

$P=P(1)*P(2)=(0.04)(0.1)=0.004$ =0.4%

3 0

3 years ago

Anna just accepted a job at a new company where she will make an annual salary of $66000. Anna was told that for each year she s

NikAS [45]

Answer:

90000

Step-by-step explanation:

I put 4000 times 6 years then added that to 66000 then got 90000.

5 0

3 years ago

Read 2 more answers