Clackamas Community College MATH MISC A Key Hull MTH 111 W21 Focus Set 1 Directions: Give all answers in simplified, exact form unless otherwise indicated and includeunits where applicable. All work should be submitted on separate paper. For full directions, referto the “Focus Set Guidelines” provided on the Moodle page.You may use either the “verbose” or “terse” approach from the “
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Clackamas Community College MATH MISC A Key Hull MTH 111 W21 Focus Set 1
Directions: Give all answers in simplified, exact form unless otherwise indicated and include
units where applicable. All work should be submitted on separate paper. For full directions, refer
to the “Focus Set Guidelines” provided on the Moodle page.
You may use either the “verbose” or “terse” approach from the “Focus Set Example” document.
1. A street sweeper truck has a 4,000 gallon capacity. It arrives at the filling station with 200 gallons of
water. It takes one hour to fill the truck. The graph shows the amount of water
V in thousands of
gallons contained in the truck
t hours after 12:00pm (noon).
a. State the units of horizontal axis. Hours since noon.
State the units of vertical axis. Thousands of gallons of water.
b. State the domain and range of function
f and include units.
domain: [0, 6] hours range: [200, 4000] gallons of water
c. Is
f a one-to-one function? State why or why not
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