Set Up and Solve an Equation $\frac { 5 } { 8 }$

question 18

Multiple Choice

Set up and solve an equation. Round to the nearest tenth. A $\frac { 5 } { 8 }$ -inch garden hose fills a child's pool in 1 hour. A $\frac { 1 } { 2 }$ -inch garden hose fills a child's pool in 1.2 hours. How long will it take to fill the pool if both hoses are used at once?

• A) 0.4 hr
• B) 0.5 hr
• C) 1.8 hr
• D) 5.5 hr
• E) 4.5 hr

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Definitions:

Rubisco

An enzyme that catalyzes the first major step of carbon fixation in the process of photosynthesis.

Photorespiration

A metabolic pathway in plants that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; it occurs when oxygen levels are high and carbon dioxide levels are low.

RuBP

Ribulose bisphosphate, a sugar involved in the initial step of carbon fixation in the process of photosynthesis.

Oxygen

A reactive, life-sustaining component of the atmosphere, essential for cellular respiration in aerobic organisms and critical for combustion processes.