Solve the problem.At an altitude of h feet above the surface of the earth, the approximate distance in miles that a person can see is given by 
How far can a person see if he or she is 790 feet above the earth's surface? Round your answer to the nearest tenth of a mile, if necessary.
A. 34.4 miles
B. 35.5 miles
C. 40.1 miles
D. 36.8 miles
Answer: A
Mathematics
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Use the elimination method to solve the system.3 x - y = 145x + y = 26
A. (5, 1) B. (5, 2) C. No solution D. (1, 5)
Mathematics
Ions are atoms or groups of atoms with positive or negative electrical charges. The charges of some ions are given. Use this information to find the total charge. 
4 calcium ions and 2 oxalate ions
A. +4 B. -4 C. -12 D. +12
Mathematics
Find the special product using the appropriate formula.(x + 15)2
A. x2 + 30x + 225 B. x + 225 C. 225x2 + 30x + 225 D. x2 + 225
Mathematics
Find x and y such that 
subject to 
, 
style="vertical-align:middle;" />, 
attains a maximum value.
?
A. 
B. 
?
C. ?
D. ?
E. ?
Mathematics