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trapecia [35]
2 years ago
5

Please help me as soon as posable!! In hurry!!(24 points)

Mathematics
1 answer:
attashe74 [19]2 years ago
4 0

The sequence is geometric, so

a_n = r a_{n-1}

for some constant r. From this rule, it follows that

a_3 = r a_2 \implies 20 = 2r \implies r = 10

and we can determine the first term to be

a_2 = r a_1 \implies 2 = 10 a_1 \implies a_1 = \dfrac15

Now, by substitution we have

a_n = r a_{n-1} = r^2 a_{n-2} = r^3 a_{n-3} = \cdots

and so on down to (D)

a_n = r^{n-1} a_1 = 10^{n-1} \cdot \dfrac15

(notice how the exponent on r and the subscript on a add up to n)

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HELPPPP
fredd [130]

Not sure if this is correct but:

Step-by-step explanation: P = 2000

                                             R = 5% = 0.05

                                             n = 4

                                      y = 2000 ( 1 + \frac{0.05}{4}) ^{4t} = 2000 ( 1.0125 )

                                       Substitute values in the compound interest formula:

                                        y = P ( 1 + \frac{r}{n})^{nt} .

Hope this helps..                  

6 0
3 years ago
What is the approximate circumference of a circle with the diameter of 9
WINSTONCH [101]

Answer:

9pi

Step-by-step explanation:

circumference is 2(pi)(r) or diameter(pi)

6 0
3 years ago
Find the area and perimeter. Stuck on this one need help
masya89 [10]

9514 1404 393

Answer:

  • area: 114 square units
  • perimeter: 44 units

Step-by-step explanation:

The figure is a trapezoid with bases 12 and 7, and a height of 12. The area formula is ...

  A = (1/2)(b1 +b2)h

  A = (1/2)(12 +7)(12) = 114 . . . square units area

__

The length of side AB can be found using the distance formula:

  d = √((x2 -x1)^2 +(y2 -y1)^2)

  d = √((6 -(-6))^2 +(1 -6)^2) = √(144 +25) = 13

The sum of the side lengths is then ...

  13 +7 +12 +12 = 44 . . . units perimeter

8 0
3 years ago
Write all ratios in is There are three children in the Skosana family. Each week the eldest earns R270, the middle child earns R
geniusboy [140]

From the amounts that are given, the ratio of the earnings will be 3:2:1.

<h3>How to calculate ratio</h3>

From the information, the eldest earns R270, the middle child earns R180 and the youngest earns R90.

Therefore, the common factor to the numbers will be 90. Therefore, the ratio will be:

270/90 = 3

180/90 = 2

90/90 = 1

The ratio is 3:2:1.

Learn more about ratio on:

brainly.com/question/2328454

4 0
2 years ago
What is 6/15 reduced
Taya2010 [7]
It's 2/5 because they both are divisible by 3 and when you divide by three on both numerator and denominator you get 2/5.
5 0
3 years ago
Read 2 more answers
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