Which phrase describes earth's magnetic declination?

I just took the test and got 100%

1: B, unlike poles repel each other

2: D, all of the above

3: A, domain; no

4: D, the angle between true north and north indicated by a compass

5: D, forms circles the go around the wire

6: D, causes alignment of the domains in the iron

7: B, the magnetic field B

8: C, perpendicular to both the current and the magnetic field

9: A, it rotates 180 degrees

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .