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According to An Inconvenient Truth, what is the role of infrared radiation in global warming?

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  1. http://quizlet.com/12238792/an-inconvenient-truth-flash-cards/

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    Ms. Sue
  2. Hey my teacher is out sick and you did our midterm review a while back. Can you please give me the answers if it wouldn't be to much trouble for you.

    Write the first four terms of the sequence whose general term is given.

    an = 3n - 1
    Answer

    2, 3, 4, 5

    2, 5, 8, 11

    -2, -5, -8, -11

    4, 7, 10, 13

    3 points
    Question 2

    Write the first four terms of the sequence whose general term is given.

    an = 2(2n - 3)
    Answer

    -6, -2, 2, 6

    -1, 1, 3, 5

    -2, -4, -6, -8

    -2, 2, 6, 10

    3 points
    Question 3
    Write the first four terms of the sequence whose general term is given.

    an = 4n
    Answer

    1, 16, 81, 256

    4, 16, 64, 256

    1, 4, 16, 64

    16, 64, 256, 1024

    3 points
    Question 4

    Write the first four terms of the sequence whose general term is given.

    an = (2/3)n
    Answer

    1, , ,

    , , ,

    1, , ,

    , , ,

    3 points
    Question 5

    Write the first four terms of the sequence whose general term is given.

    an = (-1)n(n + 5)
    Answer

    6, 7, 8, 9

    -6, -14, -24, -36

    -6, 7, -8, 9

    -6, -7, -8, -9

    3 points
    Question 6

    Write the first four terms of the sequence whose general term is given.

    an = (-1)n + 1(n + 6)
    Answer

    -7, 8, -9, 10

    -8, 9, -10, 11

    7, -8, 9, -10

    7, -16, 27, -40

    3 points
    Question 7

    Write the first four terms of the sequence whose general term is given.

    an =
    Answer

    4, , , 1

    -4, , , 1

    4, - , , 1

    -4, - , , 1

    3 points
    Question 8

    Write the first four terms of the sequence defined by the recursion formula.

    a1 = -5 and an = an-1 - 3 for n ≥ 2
    Answer

    -5, - 4, - 1, 2

    5, 2, -1, -4

    -5, -8, -11, -14

    5, 8, 11, 14

    3 points
    Question 9

    Write the first four terms of the sequence defined by the recursion formula.

    a1 = -6 and an = -2an-1 for n ≥ 2
    Answer

    6, -12, 24, -48

    -6, 14, -26, 50

    -6, -12, -24, -48

    -6, 12, -24, 48

    3 points
    Question 10

    Write the first four terms of the sequence defined by the recursion formula.

    a1 = 4 and an = 3an-1 + 2 for n ≥ 2
    Answer

    4, 14, 44, 134

    4, 10, 28, 82

    4, 12, 36, 108

    4, 14, 38, 110

    3 points
    Question 11

    Find the indicated sum.

    Answer

    46

    60

    14

    24

    3 points
    Question 12

    Find the indicated sum.

    Answer

    3 points
    Question 13

    Find the indicated sum.

    Answer

    39

    30

    84

    120

    3 points
    Question 14

    Find the indicated sum.

    Answer

    45

    110

    74

    120

    3 points
    Question 15

    Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.

    Find a8 when a1 = -10, d = -3.
    Answer

    -31

    11

    -34

    14

    3 points
    Question 16

    Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.

    Find a21 when a1 = 28, d = -5.
    Answer

    -77

    128

    -100

    -72

    3 points
    Question 17

    Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.

    1, 4, 7, 10, 13, . . .
    Answer

    an = 3n + 2; a20 = 62

    an = n + 3; a20 = 23

    an = 3n - 2; a20 = 58

    an = 2n - 3; a20 = 37

    3 points
    Question 18

    Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.

    25, 16 , 7, -2, . . .
    Answer

    an = -9n + 25; a20 = -155

    an = -9n + 34; a20 = -146

    an = 9n - 25; a20 = 155

    an = 9n - 34; a20 = 146

    3 points
    Question 19

    Solve the problem.

    The population of a town is increasing by 200 inhabitants each year. If its population at the beginning of 1990 was 27,842, what was its population at the beginning of 1998?
    Answer

    222,680 inhabitants

    29,442 inhabitants

    29,242 inhabitants

    445,360 inhabitants

    3 points
    Question 20

    Find the indicated sum.

    Find the sum of the first 50 terms of the arithmetic sequence: 3, -4, -11, -18, . . .
    Answer

    -8600

    -8425

    -347

    -8420

    3 points
    Question 21

    Find the indicated sum.

    Find the sum of the first 48 terms of the arithmetic sequence: 2, 4, 6, 8, . . .
    Answer

    98

    2359

    2400

    2352

    3 points
    Question 22

    Write out the first three terms and the last term of the arithmetic sequence.

    Answer

    -5 - 1 + 7 - . . . + 85

    1 + 31 + 103 + . . . + 535

    -5 + 1 + 7 + . . . + 85

    1 + 7 + 13 + . . . + 85

    3 points
    Question 23

    Use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum.

    Answer

    -1522.5

    -1421

    -1595

    -1537

    3 points
    Question 24

    Solve the problem.

    A theater has 32 rows with 20 seats in the first row, 25 in the second row, 30 in the third row, and so forth. How many seats are in the theater?
    Answer

    6400 seats

    6240 seats

    3120 seats

    3200 seats

    3 points
    Question 25

    If the given sequence is a geometric sequence, find the common ratio.

    4, 16, 64, 256, 1024
    Answer

    4

    16

    not a geometric sequence

    3 points
    Question 26

    If the given sequence is a geometric sequence, find the common ratio.

    , , , ,
    Answer

    20

    4

    3 points
    Question 27

    Write the first five terms of the geometric sequence.

    a1 = 7; r =
    Answer

    , , , ,

    7, , , ,

    7, , , , 8

    7, 28, 112, 448, 1792

    3 points
    Question 28

    Write the first five terms of the geometric sequence.

    an = 5an-1; a1 = 3
    Answer

    15, 75, 375, 1875, 9375

    3, 8, 13, 18, 23

    5, 15, 75, 375, 1875

    3, 15, 75, 375, 1875

    3 points
    Question 29

    Use the formula for the sum of the first n terms of a geometric sequence to solve.

    Find the sum of the first six terms of the geometric sequence: 3, 15, 75, . . . .
    Answer

    11718

    93

    3906

    910

    3 points
    Question 30

    Use the formula for the sum of the first n terms of a geometric sequence to solve.

    Find the sum of the first 11 terms of the geometric sequence: -3, -6, -12, -24, -48, . . . .
    Answer

    -6161

    -6139

    -6141

    -6104

    3 points
    Question 31

    Use the formula for the sum of the first n terms of a geometric sequence to solve.

    Find the sum of the first five terms of the geometric sequence: , , , . . . .
    Answer

    3 points
    Question 32

    Find the indicated sum. Use the formula for the sum of the first n terms of a geometric sequence.

    Answer

    -2460

    -156

    244

    -7710

    3 points
    Question 33

    Solve the problem.

    A job pays a salary of 29,000 the first year. During the next 6 years, the salary increases by 6% each year. What is the salary for the 7th year? What is the total salary over the 7-year period? (Round to the nearest cent.)
    Answer

    $43,605.28; $287,026.57

    $41,137.05; $243,421.29

    $41,137.05; $202,284.24

    $43,605.28; $202,300.9

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