Check the picture below, let's use those two points on the line to get its slope.

Answer:
$300
Step-by-step explanation:
10+15=25% or 1/4
400/4=100
400-100=300
Answer:
I tried my best to explain it, hope it helps!
Step-by-step explanation:
Answer:
Total magnification of microscope at this setting is 40X
Step-by-step explanation:
Total magnification of microscope is determined by multiplying the magnification power of individual lenses.
So if eyepiece has magnification power of 10X and objective lense has magnification power of 4X , the total magnification of microscope would be
10 × 4 = 40
which means the object will appear 40 times larger than actual object.