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malfutka [58]
3 years ago
11

70. Area A car's rear windshield wiper rotates 125º. The

Mathematics
1 answer:
Gre4nikov [31]3 years ago
5 0

Answer:

175 square inches

Step-by-step explanation:

Area wiped by the wiper blade = Area covered by the whole wiper mechanism - Area that is not being wiped.

Where area of a sector of 125°....Area = 1/2.r^2.theta....but with theta in radians

Area covered of the whole wiper mechanism;

= 1/2 × 25^2 × (25pi/36)...in which (25pi/36) is 125° in radians..

=217.014pi

Area that is not being wiped;

= 1/2 × (25 - 14)^2 × (25pi/36)

= 42.014pi

Area wiped by the wiper blade

217.014 - 42.014

Area = 175 square inches

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8 0
3 years ago
-2(2x+3)=-4(x+1) - 2
mario62 [17]

Answer:

All real numbers are solutions

Step-by-step explanation:

Let's solve your equation step-by-step.

−2(2x+3)=−4(x+1)−2

Step 1: Simplify both sides of the equation.

−2(2x+3)=−4(x+1)−2

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Step 2: Add 4x to both sides.

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Step 3: Add 6 to both sides.

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All real numbers are solutions.

8 0
3 years ago
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Step-by-step explanation:

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two men A and B stand on opposite sides of a 100 metre tower.A observes the angle of elevation of the top of the tower as 45 and
Zepler [3.9K]

9514 1404 393

Answer:

  273 m

Step-by-step explanation:

The tower represents the short side of a 30°-60°-90° right triangle. The distance from the tower represents the long leg, not the hypotenuse, of that triangle. It is √3 times the short side. In this geometry, man B is 100√3 = 173.2 meters from the tower.

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