Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model 
where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, at what depth is the water 10 degrees? (Round to the nearest foot.)
A. 10 ft
B. 66 ft
C. 47 ft
D. 28 ft
Answer: A
Mathematics
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A. 0
B. 5
C. 1
D. 
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Find all real numbers in the interval [0, 2?) that satisfy the equation.cos2x + 2 cos x + 1 = 0
A. 
B. 
C. 
D. 
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Divide as indicated.(25x3 + 40x2 - 5x - 3) ÷ (5x + 3)
A. 5x2 + 5x - 4
B. 5x2 + 5x - 4 + 
C. x2 - 4 + 
D. 5x2 + 5x - 4 + 
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Provide mssing statements and missing reasons for the proof of the theorem,“Corresponding altitudes of congruent triangles are congruent.”Given: 
; 
and 
Prove: 
S1. 
R1.S2. 
and 
R2.S3. R3. GivenS4. 
and 
are rt. 
R4.S5. R5. All right angles are congruent.S6. 
R6.S7. R7.
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Mathematics