For big circle the diameter is 10 so the radius is 5. Use the equation for the area of a circle pi r^2.
Pi is 3.14 as said in the question.
So 3.14 x 5^2 or 25 x 3.14=78.5
For smaller circle, diameter is 6cm so the radius is 3.
Using the same area of a circle equation it would equal 3.14 x 3^2 or 9 x 3.14=28.26
Take 28.26 away from 78.5 to get 50.24.
To the nearest tenth would mean it would equal 50.2
The last option is the answer
Step-by-step explanation:
When x = -4 ;
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Answer: A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as a guide to making the object in full size.
Answer:
x - axis
Step-by-step explanation:
under a reflection in the x- axis
a point (x, y ) → (x, - y )
(2, - 3 ) → (2, 3 ) is thus a reflection in the x- axis
Answer:
ABC = 27
DBC = 56
Step-by-step explanation:
ABC + CBD = ABD
x+10 + 4x-12 = 83
Combine like terms
5x -2 = 83
Add 2 to each side
5x-2+2 = 83+2
5x = 85
Divide each side by 5
5x/5 = 85/5
x =17
ABC = x+10 = 17+10 = 27
DBC = 4x-12 = 4*17 -12 = 68-12 = 56