What is the solution to (3 x 10^2) (5 x 10^5) written in scientific notation?

1.5 x 10^8
15 x 10^8
1.5 x 10^7
15 x 10^7

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv

How do i do this activity, is appreciated

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?