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: 5, 10, 20, . . . .
A. 315
B. 35
C. 63
D. 31,248
Answer: A
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Find the volume of the solid. When necessary, use 3.14 as the approximate value of ?, and round as instructed.Find the volume of a cylinder with radius 4 cm and height 6 cm. Round to the nearest tenth.
A. 175.8 cm3 B. 301.4 cm3 C. 251.2 cm3 D. 125.6 cm3
Solve the problem.Weather is classified as sunny or cloudy in a certain place. What are the long-term predictions for sunny and cloudy days? Round numbers to the nearest thousandths.SunnyCloudy 
A. 
B. 
C. 
D. 
Simplify, where possible.2a - 6b + 4c - 2(6a + 8b - 7c)
A. -10a - 14b + 11c B. -10a + 10b - 10c C. -4a + 2b - 3c D. -10a - 22b + 18c
Solve the equation. Express irrational answers in exact form and as a decimal rounded to 3 decimal places.ln x + ln (x + 4) = 1
A. 
? 2.326
B. 
? 0.592
C. 
? -4.592
D. -4 + 
? 1.184