Answer:
Slope
Step-by-step explanation:
slope is the ratio of the vertical and horizontal changes between two points on a surface or a line
Answer:

Step-by-step explanation:
Given that,
The frequency of x-rays, 
We need to find the wavelength for x-rays. The relation between wavelength, frequency and speed of light is given by :

So, the wavelength for x-rays is
.
6x = 15
I apologize if this is wrong!
Answer:
A:60
Step-by-step explanation:
9ftx10ft= 90 ft squared = 1080 inches
1080/36 (6x6=36) inches= 30 white tiles x2 because of the ratio
60 white tiles