Help me asap!!! Can’t figure it out for a test
1 answer:
Answer:
C. (0, -1) maximum
Step-by-step explanation:
look at the graph. notice that the graph only goes as high as the very top of the parabola, and then the rest of it just gets lower in number.
since it only gets as high in value as the top point, thats called a maximum.
that top point's coordinates are (0, -1)
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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%
One small circle with radius b, and a larger circle with radius a+b.
The areas of these 2 circles are respectively:
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:
the actual wiped area is
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%
Answer:
The positive value of will result in exactly one real root is approximately 0.028.
Step-by-step explanation:
Let , roots are those values of
so that
. That is:
(1)
Roots are determined analytically by the Quadratic Formula:
The smaller root is , and the larger root is
.
has one real root when
. Then, we solve the discriminant for
:
The positive value of will result in exactly one real root is approximately 0.028.