Since you can 4 pieces from 1 foot, you multiply 4 by 5 and you get 20 pieces.
Answer:
C. x+log(z)
Step-by-step explanation:
Taking the log of the equation gives ...
log(z) = (x -y)log(1/10) = (x -y)log(10^-1)
log(z) = (x -y)(-1) = y -x
Adding x gives ...
x + log(z) = y . . . . . matches choice C
Answer with Step-by-step explanation:
We are given that
ABCE is a rectangle .Rectangle is that quadrilateral in which opposite sides are equal and each is equal to 90 degrees.
D is the midpoint of E.
We have to prove that 
Statement:1 ABCE is a rectangle.D is the mid point of CE
Reason: Given
Statement 2:
Reason:By definition of rectangle
Statement:3 AE=BC
Reason: By definition of rectangle
Statement 4:
Reason: By definition of midpoint because D is the midpoint of side EC
Statement 5:
Reason:SAS postulate
Statement: 6 
Reason:CPCT
Hence proved.
He can do this by walking backwards 19 steps from his starting point.