1. Which statement below supports the bohr's model of the atom? A. The model accounted for the absorption spectra of atoms but not for the emission spectra
B. The model was accounted for describing the electron to be moving in definite orbits around the
nucleus.
C. The model was based on the wave properties of the electron.
D. The model accounted for the emission spectra of atoms, but not for the absorption spectra.​

your answer is c! hope this : )

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form