If the sin 30° is 1/2, then the cos ____° = _____. A. 60° , 1/2 B. 30° , square root of 2/ 2 C. 60° , square root of 3/ 2 D. 30°
1 answer:
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A number is rational if it can be expressed as the ratio between two integers (of course the denominator can't be zero).
-1/16 is already a fraction, so it's rational.
0 can be expressed as a fraction: for any non-zero integer
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can't be expressed via a fraction between integers, and thus they are irrational.
Answer:
Option B. 373.80 square centimeters
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
The surface area of the figure is equal to the area of its 5 faces (3 rectangular faces plus 2 triangular faces)
step 1
Find the area of its 3 rectangular faces
step 2
Find the area of its 2 triangular faces
step 3
Find out the surface area
substitute the values
