The answer to this is A. 650. You find the surface area of the two cubes, then the rectangular prism, then you add them together.<span />
Answer:
(4,5)
Step-by-step explanation:
Rotating a <em>point </em>by 90 degrees <em>counterclockwise</em> would make the y become x and switch it's negative/positive value, and make x the y.
Ex: (x,y) would become (-y,x)
Answer:
Step-by-step explanation:
Apparently, you're supposed to recognize that the formula tells you the value of cos(x/2).
Answer:
20 meters
Step-by-step explanation:
Seeing the image attached, we can observe that there is a triangle formed by half of the chord of the arc, the radius (hypotenusa) and part of the radius (r-4). Using pythagoras theorem in this triangle, we have:
(r-4)^2 + 12^2 = r^2
r^2 - 8r + 16 + 144 = r^2
8r = 160
r = 20
So the radius of the circle that contains this arc is 20 meters.
