Solve the problem.How many liters of 80% hydrochloric acid must be mixed with 40% hydrochloric acid to get 15 liters of 65% hydrochloric acid? Write your answer rounded to three decimals.
A. 3.125 L
B. 8 L
C. 4.688 L
D. 9.375 L
Answer: D
Mathematics
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Use l'Hopital's Rule to evaluate the limit.
A. 
B. 0
C. 
D. - 
Mathematics
Solve.For a hyperbolic mirror the two foci are 44 cm apart. The distance of the vertex from one focus is 6 cm and from the other focus is 38 cm. Position a coordinate system with the origin at the center of the hyperbola and with the foci on the y-axis. Find the equation of the hyperbola.
A. 
- 
= 5
B. 
- 
= 1
C. 
- 
= 5
D. 
- 
= 1
Mathematics
Identify the greatest common factor.19x4 - 76x2
A. 19x B. 76x2 C. 19x4 D. 19x2
Mathematics
Find the inverse, if it exists, of the given matrix.A = 
A. No inverse
B. 
C. 
D. 
Mathematics