To determine the width of a river from point A to point B , a surveyor walks downriver 50 ft along a line perpendicular to A B ¯ to a new position at point C . The surveyor determines that the measure of ∠ A C B is 60 ° . Find the exact width of the river from point A to point B .
To determine the width of a river from point A to point B , a surveyor walks downriver 50 ft along a line perpendicular to A B ¯ to a new position at point C . The surveyor determines that the measure of ∠ A C B is 60 ° . Find the exact width of the river from point A to point B .
To determine the width of a river from point
A
to point
B
, a surveyor walks downriver
50
ft
along a line perpendicular to
A
B
¯
to a new position at point
C
. The surveyor determines that the measure of
∠
A
C
B
is
60
°
. Find the exact width of the river from point
A
to point
B
.
Use the information to find and compare Δy and dy. (Round your answers to four decimal places.)
y = x4 + 7 x = −3 Δx = dx = 0.01
Δy =
dy =
4. A car travels in a straight line for one hour. Its velocity, v, in miles per hour at six minute intervals is shown
in the table. For each problem, approximate the distance the car traveled (in miles) using the given method,
on the provided interval, and with the given number of rectangles or trapezoids, n.
Time (min) 0 6 12 18|24|30|36|42|48|54|60
Speed (mph) 0 10 20 40 60 50 40 30 40 40 65
a.) Left Rectangles, [0, 30] n=5
b.) Right Rectangles, [24, 42] n=3
c.) Midpoint Rectangles, [24, 60] n=3
d.) Trapezoids, [0, 24] n=4
The bracket BCD is hinged at C and attached to a control cable at B. Let F₁ = 275 N and F2 = 275 N.
F1
B
a=0.18 m
C
A
0.4 m
-0.4 m-
0.24 m
Determine the reaction at C.
The reaction at C
N Z
F2
D
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