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irakobra [83]
2 years ago
7

The round temperature dial on a thermostat has a diameter of 26 millimeters. What is the dial's circumference?

Mathematics
1 answer:
aleksandrvk [35]2 years ago
3 0

C = 2 x pi x r = pi x d

so

C = 3,14 x 26 = 81,64 mm

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Work out the area of this circle.
Vlada [557]

Answer:

530.998cm^2

Step-by-step explanation:

General formula for the area of a circle is πr^2

And π is given to be 3.142

R is 13 cm

So let's apply the formula

Area=3.142×(13^2)

Area=3.142×169

Area=530.998cm^2

So the area of the circle is 530.998cm^2

6 0
3 years ago
cylinder has radius of 6 ft and height of 9 ft. how do you calculate the volume of a cone that fits exactly inside cylinder
Viefleur [7K]
Couldn't you use pi • r^2•height That's the cylinder formula. Or you could use the cone formula pi•r^2•height/3
4 0
3 years ago
What are the coordinates of the image of vertex R after a reflection across the y-axis?
vfiekz [6]
Consider any point P(x, y) in the coordinate axis.

The reflection of this point across the y-axis is the point P'(-x, y).

(x, y) and (-x, y) are the 'mirror' images of each other, with the y'axis as the 'mirror'.

For example the coordinates of the image of P(4, 13) after the reflection across the y-axis is P'(-4, 13)

or, if P(-5, -9), then P'(5, -9)


Answer: if coordinates of V are (h, k), coordinates of V' are (-h, k) 



3 0
3 years ago
Read 2 more answers
What is the slope of (-3,3),(1,-3)
MrMuchimi

Answer:

the slope is

             3

      -    ----

             2

Step-by-step explanation:

IDK, but this is the correct answer, may i please have brainliest


4 0
3 years ago
Can someone help with the two triangle questions (will mark brainliest!!)
yaroslaw [1]

Answer: Number 1 is c=89 ft

Number 2 is b=3 cm

Step-by-step explanation: a²+b²=c²

For number 1, 39 ft is a and 80 ft is b so

39²+80²=c² so 39² is 39x39=1521 and 80² is 80x80=6400 so 6400+1521=7921

7921=c² and the square root of 7921 is 89 so c=89 ft

For number 2, a=1.6 cm and c=3.4 cm so 3.4²-1.6²=b²

3.4² so 3.4x3.4 which is 11.56

1.6² so 1.6x1.6 which is 2.56

11.56-2.56=c² and 11.56-2.56=9

Square root of 9 is 3 so b=3

So number 2 answer is b=3 cm

I hope this helps

4 0
2 years ago
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