A sector with a central angle measure of 4pi/5

Mathematics

2 answers:

ELEN [110]3 years ago

4 0

Answer: the area is 20 square centimeters.

Step-by-step explanation:

The area of an arc of angle x in a circle of radius r is:

A = (x/3.14)*3.14*r^2 = x*r^2

here we have x = (4/5)*3.14 and r = 5cm

Then the area is:

A = (4/5)*(5cm)^2 = 20cm^2

Vesna [10]3 years ago

3 0

Answer:

10pi^2

Step-by-step explanation:

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Bess [88]

Answer: There are 6 bricks in the bag.

Step-by-step explanation:

Convert from mixed number to decimal number. To do it, divide the numerator of the fraction by the denominator and add the result to the whole number part. Then:

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Convert from fraction to decimal number. To do it you need to divide the numerator by the denominator. Then, you get:

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Let be "x" the number of bricks in the bag<em>.</em>

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3 years ago

A bird at the top of a tree looks down at a field mouse with an angle of depression of 65Á. If the field mouse is 30 meters from

Dafna11 [192]

Correct answer is 33.1 m.

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$sin{65^o}= \frac{30}{x} 
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