In exercises 1-5, find the sum of the arithmetic sequence having the data given. Project 8.02
<span>a1 = 5, an = 3, n = 20 </span>
<span>a1 = 7, d = - 3, n = 20 </span>
<span>a1 = 81, an = - 13, n = 20 </span>
<span>a1 = 5, d = 7, n = 120 </span>
<span>an = 5, d = -2, n = 12 </span>
circumference of circle: 2πr ("r" is the radius)
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Answer:
90
Step-by-step explanation:
2Tu = 2(5)(9)
= 2(45)
= 90