Solve the problem.A surveyor is measuring the distance across a small lake. He has set up his transit on one side of the lake 140 feet from a piling that is directly across from a pier on the other side of the lake. From his transit, the angle between the piling and the pier is 40°. What is the distance between the piling and the pier to the nearest foot?
A. 117 feet
B. 167 feet
C. 107 feet
D. 90 feet
Answer: A
Mathematics
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Solve.x2 - 
x = - 
A. 
, 
B. 
, 
C. 
i, 0
D. 0, - 
i
Mathematics
Determine whether the relation represents a function. If it is a function, state the domain and range.
A. function domain:{16, 20, 24, 28} range: {4, 5, 6, 7} B. function domain: {4, 5, 6, 7} range: {16, 20, 24, 28} C. not a function
Mathematics
Solve and check.100y2 - 121 = 0
A. 
B. 
C. - 
, 
D. - 
, 
Mathematics
Find the formula and limit as requested.For the function f(x) = 2x2+ 4, find a formula for the upper sum obtained by dividing the interval [0, 3] into n equal subintervals. Then take the limit as n?? to calculate the area under the curve over [0, 3].
A. 12 + 
; Area = 18
B. 12 + 
; Area = 30
C. 12 + 
; Area = 30
D. 12 + 
; Area = 12
Mathematics