Answer:
woven blanket
Step-by-step explanation:
The artifact with the lowest elevation would be the artifact that was found in the <u>least</u> amount of feet, most likely being negative.
Thus, given the information above, we can conclude that the answer is woven blanket because it was found at -977 feet, and no other artifacts in the table were found any lower.
For this case we have that by definition, the equation of a line in the point-slope form is given by:

Where:
m: It is the slope of the line and
is a point through which the line passes.
We have the following equation of the slope-intersection form:

Where the slope is 
By definition, if two lines are perpendicular then the product of their slopes is -1.
Thus, a perpendicular line will have a slope:

Thus, the equation will be of the form:

Finally we substitute the given point and we have:

Answer:
Option B
Once the numbers have the same base and exponents, we can add or subtract their coefficients.Here are the steps to adding or subtracting numbers in scientific notation:Determine the number by which to increase the smaller exponent by so it is to the equal larger exponent
A decimal point. Im guessing you meant to say tenths instead of tens