Answer: 
Step-by-step explanation:

In order for the data set to represent a function, there can be no duplicates of the first value.
A. 1 is used as the first value more than once <em> it is NOT a function</em>
B. 3 is used as the first value more than once <em> it is NOT a function</em>
C. no first number is used more than once <em>it IS a function</em>
D. 3 is used as the first value more than once <em> it is NOT a function</em>
Answer: C
Answer: H20
Step-by-step explanation: Water’s periodic form is H20
If you have a slope of -4 then it would be -4/1 because rise/run. If it were -4/-1 then the slope would be 4.
Answer:
Step-by-step explanation:
r = 0.9 m
h = 3.6 m
Area of two circle faces combined: 2*π(0.9)^2 = 1.62π
Lateral area = circumference*height = 2π(0.9)(3.6) = 6.48π
Surface Area = 1.62π + 6.48π = 8.1π m sq.