Answer:
A man borrows * 8000
He agrees to repay with a total interest of 1360 in 12 monthly instalments.
Each instalment being less than the preceding one by * 40
= 
x 40
= 12 x 34
= 408 (Ans)
Which one is the radius and which one is the height?
Answer: You are correct. There is only one answer and that is choice B) vertical line of symmetry.
We can draw a vertical line through the center to have one half mirror over this line to get the other half. We can't do the same with a horizontal line or any other kind of line.
We do not have rotational symmetry. Rotating the figure will produce an image different from the original. The angle of rotation is some angle x such that 0 < x < 360.
The formula for the surface area of a cylinder is:
Plug in what we know, use 3.14 to approximate for pi(radius is half the diameter, 30/2 = 15):
Simplify:
Subtract 1413 to both sides:
Divide 94.2 to both sides:
So the height is approximately 45 millimeters.
★ QUADRATIC RESOLUTION ★
Roots of the given equation will be imaginary because it's discriminant is less than 0 and hence it'll yield imaginary solutions
D < 0
b² - 4ac < 0
4² - 4 ( 5 ) < 0
16 - 20 < 0
-4 < 0
Hence it's character is stated above
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