8
QuizMultiple Choice

Patterns

Question 8 • EF Math 12 1st Nine Weeks

After a gas-filled balloon is released, it rises 90 feet by the end of the first minute. By the end of the second minute, the balloon rises 120 feet, and by the end of the third minute, it rises 150 feet. How many feet would the balloon rise in 8 minutes?

Answer
A
300
B
330
C
390
D
660

Explanation

The balloon rises 30 more feet each minute: 120 − 90 = 30 and 150 − 120 = 30. Continuing the pattern, the rise in the eighth minute is 90 + 7(30) = 300 feet, so the correct choice is 300 feet.

AI-written and checked against the verified answer.

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