Solve the problem.An isosceles triangular plate is submerged vertically in seawater, with its base on the bottom. The base is 
long, and the height of the triangle is 
. Find the fluid force exerted on one face of the plate if the water level is 
above the base of the triangle. Seawater weighs 
Round your answer to one decimal place if
necessary.
A. 1194.7 lb
B. 1792 lb
C. 3584 lb
D. 341.3 lb
Answer: A
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Solve the logarithmic equation.log (4 + x) - log (x - 4) = log 3
A. ?
B. - 8
C. 
D. 8
Solve the system of equations by the substitution method. Check your solutions.
A. {(3, 4), (4, 3)} B. {(-3, 4), (-4, 3)} C. {(-3, -4), (4, 3)} D. {(3, -4), (4, -3)}
Solve the problem.Mardi received an inheritance of $60,000. She invested part at 11% and deposited the remainder in tax-free bonds at 12%. Her total annual income from the investments was $6900. Find the amount invested at 11%.
A. $53,100 B. $15,000 C. $29,000 D. $30,000
Find the vertex and directrix of the parabola represented by the equation:
a. vertex: 
directrix: 
b. vertex: 
directrix: 
c. vertex: 
directrix: 
d. vertex: 
directrix: 