Bottled Water Sales Annual sales of bottled water in the United States in the period 2007–2014 could be approximated by R ( t ) = 0.08 t 2 − 0.26 t + 8.8 billion gallons ( 0 ≤ t ≤ 7 ) , where t is time in years since 2007. According to the model, were annual sales of bottled water accelerating or decelerating in 2011? How fast? [ HINT: See Example 2.]
Bottled Water Sales Annual sales of bottled water in the United States in the period 2007–2014 could be approximated by R ( t ) = 0.08 t 2 − 0.26 t + 8.8 billion gallons ( 0 ≤ t ≤ 7 ) , where t is time in years since 2007. According to the model, were annual sales of bottled water accelerating or decelerating in 2011? How fast? [ HINT: See Example 2.]
Solution Summary: The author explains how the annual sales of bottled water in the united states were accelerating or decelerating in 2011.
Bottled Water Sales Annual sales of bottled water in the United States in the period 2007–2014 could be approximated by
R
(
t
)
=
0.08
t
2
−
0.26
t
+
8.8
billion gallons
(
0
≤
t
≤
7
)
,
where t is time in years since 2007. According to the model, were annual sales of bottled water accelerating or decelerating in 2011? How fast? [HINT: See Example 2.]
find the zeros of the function algebraically:
f(x) = 9x2 - 3x - 2
Rylee's car is stuck in the mud. Roman and Shanice come along in a truck to help pull her out. They attach
one end of a tow strap to the front of the car and the other end to the truck's trailer hitch, and the truck
starts to pull. Meanwhile, Roman and Shanice get behind the car and push. The truck generates a
horizontal force of 377 lb on the car. Roman and Shanice are pushing at a slight upward angle and generate
a force of 119 lb on the car. These forces can be represented by vectors, as shown in the figure below. The
angle between these vectors is 20.2°. Find the resultant force (the vector sum), then give its magnitude
and its direction angle from the positive x-axis.
119 lb
20.2°
377 lb
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