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Inga [223]
2 years ago
15

Calculate the length of the circumference of a circle with a diameter of 14cm (2dp)

Mathematics
1 answer:
kondaur [170]2 years ago
3 0
C= 2 (pi) r

d= 14 cm

d= 2r 

r= 7 cm

c= 2 (pi) (7cm)
c= 43.98

hope that helps

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in a triangle TRY measure angle R is 3 times measure angle T and measure angle Y is 15 more than measure angle T find the measur
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Answer:

Angle R is 99 degree

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Step-by-step explanation:

Let angle T be x

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Total=x+3x+x+15=5x+15

5x+15=180

5x=165

x=165/5=33

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3 0
2 years ago
man starts walking north at 2 ft/s from a point P. Five minutes later a woman starts walking south at 7 ft/s from a point 500 ft
worty [1.4K]

Answer:

\dot r \approx 8.985\,\frac{ft}{s}

Step-by-step explanation:

Let consider that vertical axis has its positive side oriented to the north and positive side of the horizontal axis has its orientation to the east. Besides, both persons walk at constant rate. Then, displacement formulas are:

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y_{1} = (2\,\frac{ft}{s})\cdot t

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The minimum distance between the man and the woman can be calculated by means of the Pythagorean Theorem:

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The rate of change of such distance is:

\dot r = \frac{(y_{1}-y_{2})\cdot (\dot y_{1}-\dot y_{2})}{\sqrt{(500\,ft)^{2}+(y_{1}-y_{2})^{2}}}

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\dot r \approx 8.985\,\frac{ft}{s}

6 0
3 years ago
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