Use the indicated formula to find the sum.Use S = 
to find the sum of 1 + 2 + 3 + . . . + 7000.
A. 12,248,250
B. 24,503,500
C. 24,496,500
D. 24,499,999.5
Answer: B
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Find the indicated derivative of the function.f'''(x) for f(x) = (7 - 3x)4
A. 324x - 756 B. -1944x + 4536 C. -72x + 168 D. 1944x - 4536
Solve.A machinist has flat metal plate that is 7.359 cm thick. He laminates the metal plate with four more layers that are 3.236 cm, 4.518 cm, 4.884 cm, and 4.575 cm thick. He then grinds off 3.958 cm from the top of the plate, then 2.841 cm more, and finally another 4.987 cm. Find the new thickness of the plate.
A. 1.932 cm B. 26.384 cm C. 16.744 cm D. 12.786 cm
Solve the problem.Claire received scores of 85, 88, 87, and 75 on her algebra tests. What score must she receive on the fifth test to have an overall test score average of at least 83?
A. at most 80 B. at most 81 C. at least 80 D. at least 81
Round the number as indicated.645 to the nearest thousand
A. 10,000 B. 1000 C. 100,000 D. 100