X+3x=144
4x=144
144/4=36
X=36
It the wiper blade (and arm) made a full rotation, 2 circles would be formed.
One small circle with radius
b, and a larger circle with radius
a+b.
The areas of these 2 circles are respectively:
and
120° is 1/3 of a complete angle 360° which form a circle, so the areas formed by the arm of length b, and the arm + the wiper blade (a+b) are:
and
in squared respectively.
the actual wiped area is
(in squared)
Area of the window is 54*24= 1296 (in squared)
thus, the ratio of the wiped area to the whole area of the window is 351.7/1296=0.271
Converted to percentages, this is 27.1%
Answer: 27.1%
The vertex for is
y = -2( x - 7/4 )^2 + 49/8
Hope this helps!
Answer:
16, 10
Step-by-step explanation:
There are 4 quarts in a gallon, so 4 gallons has 16 qt.
There are 2 pints in a quart, so 5 quarts has 10 pt.