Answer:
<h2>
512 m²</h2>
Step-by-step explanation:
The surface area is a sum of areas of four triangles with base of <em>8 m</em> and hight of <em>12 m</em> and areas of five squares with sides of <em>8 m.</em>
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<h3>
Sa = 4×¹/₂×8×12 + 5×8² = 192 + 320 = 512 m²</h3>
I think the answer is D: interview every student who eats lunch in the cafeteria
Answer
4
Step-by-step explanation:
Answer:
1.79
Step-by-step explanation:
the way you wrote the question is questionable
I'm assuming that you meant "3 (csc x)^2 - 4 = 0." Your "csc^2x" is ambiguous.
If 3 (csc x)^2 - 4 = 0, then 3[1/sin x]^2 - 1 = 0 is equivalent. We need to solve this for x.
First, rewrite this as 3[1/sin x]^2 = 4.
Next, divide both sides by 3: [1/sin x]^2 = 4/3
This quadratic equation has two roots, one positive and one negative.
Supposing [1/sin x]^2 = 4/3, then 1/sin x = 2/sqrt(3). Inverting both sides, sin x = sqrt(3)/2. Find x by finding the inverse function:
x=arcsin sqrt(3)/2 so x = 60 degrees, or pi/3 radians.
Now find the other root or roots.