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MA_775_DIABLO [31]
2 years ago
12

Find the circumference of a circular dog pen that has a radius of 35 meters. Use 227 for π.

Mathematics
1 answer:
qaws [65]2 years ago
6 0

Answer:

220

Step-by-step explanation:

Circumference of a circle is=diameter times pi

70=diameter because diameter is twice the radius

(22/7)70 is your answer

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Can anyone help me? I don't understand this. can u also give the calculations please??
S_A_V [24]
Is there another side to it?
4 0
3 years ago
Let f(x)=3x=5 and g(x)=-4+7 find (f*g)(-4)
Charra [1.4K]

Answer:

a

Step-by-step explanation Option 1:

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49

Option 2:

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18

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x

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25

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f

(

x

)

:

f

(

x

)

=

−

6

(

4

)

−

25

=

−

24

−

25

=

−

49

4 0
3 years ago
Write the fraction or mixed number as a decimal
Alenkasestr [34]

Answer:

4/10= 0.4

3 1/10= 3.1

7/10= 0.7

6 5/10= 6.5

9/10= 0.9

Step-by-step explanation:

3 0
3 years ago
A model scale is 1cm=8m if the actual object is40 metersthe model is ​
solniwko [45]

Answer:

5cm

Step-by-step explanation:

40/8=5

1*5=5

6 0
3 years ago
A small island is 3 kilometers from the nearest point p on the straight shoreline of a large lake. if a woman on the island can
yKpoI14uk [10]
The distance walked will be (12-x) km
the distance rowed will be (9+x²) km
A] The function T(x) will be given by:
Time=distance/speed
thus we shall have:
T(x)=[√(9+x²)]/2.5+(12-x)/4

B] To get the distance x=c that minimizes the time travel, we differentiate the above.
T'(x)=(1/2.5)[1/(2.5√9+x²)*2x-1/4]
this should give us 0 for x=c, thus
c/[2.5*√(9+c²)]-1/4=0
⇒c/[2.5*√(9+c²)]=1/4
c/√(9+c²)=2.5/4
squaring both sides we get:
c²/(9+c²)=5/8
8c²=5(9+c²)
8c²=45+5c²
3c²=45
c²=15
c=3.87 km

c] The least travel time is
T(c)=[√(9+c²)]/2.5+(12-c)/4
this will give us:
T(c)=[√(9+3.87²)]/2.5+(12-3.87)/4
T(c)=3.9999209~4 hours

d] The second derivative will be:
T"(x)=1/[2.5√(9+x²)]-x²/[2.5(9+x²)^(3/2)]
but
x=c=3.87
T"(x)=0.01668 hours/ mile²
Given that T(c)=0, while T(x)<0 for x<c and T(x)>0 for x>c proves that T(x)  decreases for x<c and increases for x>c, so there is a minimum at x=c


4 0
3 years ago
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