Algebra
posted by Holly .
80. Determine the sum for the arithmetic series:
n = 37, t1 = 23, t37 = 203
a. 5631
b. 8362
c. 6742
d. 4181
81. Determine the sum for the arithmetic series:
n = 100, t1 = 17, t100 = 215
a. 9900
b. 3350
c. 11,600
d. 990
82. Determine the sum for the geometric series:
n=10, r=2, t1=1
a. 341
b. 9
c. 228
d. 400
83.Find S20 if the series 1+1.1+... is arithmetic.
a. 2.9
b. 1.9
c. 39
d. 78
84. Determine the sum for the positive twodigit integers that are not divisible by 5.
a. 3960
b. 1640
c. 2830
d. 4550
85. A ship's clock strikes every half hour of a 4hour period. After the first half hour it strikes "one bell," after another half hour it strikes "two bells," and so on until it strikes "eight bells" at the end of the four hour period. It then begins a new four hour period . How many strikes of the bell occur in one day?
a. 36
b. 216
c. 192
d. 84
87. Sketch the angle in standard position, indicating its rotation by a curved arrow. Choose the quadrant where the angle is located. Angle: 240°
a. III
b. I
c. IV
d. II
88. Determine the correct formula for the measures of all angles coterminal with the angle: 140°
a. 140° + (360° + n)
b. 140° + n(360°)
c. 360° + n(180°)
d. 360° + (180° + n)
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