Question

9.8 < 20 – 9.8t < 20

Answer 1

0 < t < 1.04 or t ∈ (0, 1.04)

Explanation:

Solving in steps:

• 9.8 < 20 – 9.8t < 20
• 9.8 - 20 < -9.8t < 20 - 20 ⇒ subtract 20 from all sides
• -10.2 < -9.8t < 0 ⇒ divide all sides by -9.8, this changes inequality signs to reverse
• 0< t < 10.2/9.8
• 0 < t < 1.04 or t ∈ (0, 1.04)