Which expressions are equivalent to 4^-2*7^-2? CHOOSE TWO ANSWERS A) (4*7)^-4
B) 1/28^2
C) 7^-2/4^2
D) (4*7)^4

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Answer for 10 points show work you guys in advanced < 3

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?