(aqt73) to Section 3.8 isaacson (55826)
This print-out should have 5 questions.
Multiple-choice questions may continue on
the next column or page nd all choices
before answering.
001
In the right-angled triangle
10.0 points
1. speed = 24 sq. ft/sec
2. speed = 23 sq. ft/sec
3. speed = 23 sq. ft/sec
4. speed = 25 sq. ft/sec
5. speed = 21 sq. ft/sec
6. speed = 21 sq. ft/sec
7. speed = 22 sq. ft/sec
8. speed = 24 sq. ft/sec
x
5
A rock is thrown into a still pond and causes
a circular ripple. If the radius of the ripple is
increasing at a rate of 6 ft/sec, at what speed
is the area of the ripple increasing when its
radius is 2 feet?
the angle is increasing at a constant rate of
5 radians per hour.
At what rate is the side of length x increasing when x = 4 feet?
1. rate = 19 ft/hour
2. rate = 15 ft/hour
3. rate = 23 ft/hour
4. rate = 21 ft/hour
5. rate = 17 ft/hour
004
002
1
10.0 points
10.0 points
A street light is on top of a 10 foot pole.
Joe, who is 4 feet tall, walks away from the
pole at a rate of 3 feet per second. At what
speed the is tip of Joes shadow moving from
the base of the pole when he is 14 feet from
the pole?
At noon, ship A is 120 miles due west of
ship B . Ship A is sailing south at 10 mph
while ship B is sailing north at 30 mph.
At what speed is the distance between the
ships changing at 4:00 pm?
1. speed = 26 mph
1. tip speed = 8 ft/sec
2. speed = 32 mph
2. tip speed = 4 ft/sec
3. tip speed = 5 ft/sec
4. tip speed = 6 ft/sec
5. tip speed = 7 ft/sec
003
3. speed = 28 mph
4. speed = 30 mph
5. speed = 24 mph
10.0 points
005
10.0 points
to (aqt73) Section 3.8 isaacson (55826)
A weather balloon is rising vertically at 35
meters per second. An observer is standing
on the ground 4 meters from the point at
which the balloon was released. Determine
(in meters per second) the rate at which the
distance between the observer and the balloon
is changing when the balloon is 3 meters high
(and hence 5 meters from the observer).
1. rate = 25 meters/sec
2. rate = 23 meters/sec
3. rate = 22 meters/sec
4. rate = 24 meters/sec
5. rate = 21 meters/sec
2