1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IrinaK [193]
2 years ago
15

Please help me out with question 2

Mathematics
1 answer:
Colt1911 [192]2 years ago
6 0

n = 8

the sum to n terms of a geometric sequence is

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

where a is the first term and r the common ratio

here a = 16 and r = \frac{64}{-32} = \frac{-32}{16} = - 2

S_{n} = ( 16( 1 - ( - 2 )^n )/1 - (- 2 )) = - 1360

\frac{16}{3} ( 1 - (- 2 )^n ) = - 1360

multiply both sides by \frac{3}{16}

1 - (- 2 )^n = - 255

- (- 2 )^n = - 256

)-2)^n = 256

note that 2^{8} and (-2)^{8} = 256

hence n = 8



You might be interested in
Plz helpppp:Tammy conducted a survey to find the favorite subject of the students at her school. She asked 25 students from her
alexira [117]

Answer: Tammy's sample may not be vaild because she surveyed the students only from her class and it is likely that other classes might not like the subject maths. She might get the accurate results by surveying a larger number of people in the school instead of just her class.

3 0
2 years ago
I need help with this so could you give me the answers with an explanation if you can.​
Katarina [22]

Answer:

2.44745763 \times  {10}^{6}

Step-by-step explanation:

R =  \frac{ {x}^{2} }{y}  \\  \\  =  \frac{ {(3.8 \times  {10}^{5}) }^{2} }{5.9 \times  {10}^{4} }  \\  \\  =  \frac{14.44 \times  {10}^{10} }{5.9 \times  {10}^{4} }  \\  \\  = 2.44745763 \times  {10}^{10 - 4}  \\ = 2.44745763 \times  {10}^{6}

4 0
3 years ago
Solve the equation 9=h/9​
abruzzese [7]
ANSWER: h=1

EXPLANATION: I hope I help
8 0
3 years ago
If w=-4, which inequality is true
vlabodo [156]

Step-by-step explanation:

the answer would be the last one

cuz if u do -4(-4) it equals 20

and if u do -5+20 it equals 15

and 15>10

4 0
2 years ago
Read 2 more answers
the sum of three consecutive even integers is 6 subtracted from 4 times the middle number. Find the 3 numbers
anygoal [31]

Answer:

The three consecutive even integers are 4,6,8

Step-by-step explanation:

Let the three consecutive even integers be  2x, 2x+2, 2x + 4

Middle number = 2x +2

2x + 2x+2 + 2x + 4 = 4* (2x+2) - 6

6x + 6 = 4*2x + 4*2 - 6

6x + 6 = 8x + 8 -6

6x + 6 = 8x + 2

6x - 8x = 2 -6

-2x = -4

x = -4/-2

x = 2

The three consecutive even integers are  

2x = 2*2 = 4

2x+2 = 2*2 +2 =4 + 2 = 6

2x + 4 = 2*2+4 = 4+4 = 8

8 0
2 years ago
Other questions:
  • A large company that produces a "fat-burner" pill claims an average loss of 20 pounds in the first month. A consumer advocacy gr
    15·1 answer
  • What is the probability of throwing a number greater than 4 when rolling a number cube that has sides labeled 1, 2, 3, 4, 5, 6?
    12·1 answer
  • Scott bought a backpack for $35.99 at Walmart. He needed to pay a 10% tax. How much did the backpack cost in all?
    8·1 answer
  • What is the equation of a circle with (2,-5) and radius 4
    13·1 answer
  • Kerry cut an 8 foot long board into 6 pieces that are equal in length. Represent this problem as a fraction
    5·2 answers
  • Is a 1/2 bigger than 1/8
    14·1 answer
  • How to divide 0.62 divide 0.01
    14·1 answer
  • You buy the same number of brushes, rollers and paint cans. Write an expression in simples form that represents the total amount
    8·2 answers
  • SOMEONE PLEASE HELP MEEE!!!! HOW DO YOU DO THIS
    12·1 answer
  • Calculate. <br>a) 130% of 220​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!