Provide an appropriate response.A large oil company produces three grades of gasoline: regular, unleaded, and super-unleaded. To produce these gasolines, equipment is used which requires as input certain amounts of each of the three grades of gasoline. To produce a dollar's worth of regular requires inputs of 
worth of regular, $0.18 worth of unleaded, and $0.17 worth of super-unleaded. To produce a dollar's worth of unleaded requires inputs of $0.14 worth of regular, 
worth of unleaded, and
src="https://sciemce.com/media/4/ppg__tttt0616191201__f1q58g3.jpg" alt="" style="vertical-align: -4.0px;" /> worth of super-unleaded. To produce a dollar's worth of super-unleaded requires inputs of 
worth of regular, $0.17 worth of unleaded, and $0.11 worth of super-unleaded. In addition, the oil company has final demands for each of the different grades of gasoline. Find the coefficient matrix that would be used in determining the total output of each grade of gasoline.
A.
A = 
B.
A = 
C.
A = 
D.
A = 
Answer: C
Mathematics
src="https://sciemce.com/media/4/ppg__tttt0616191201__f1q58g3.jpg" alt="" style="vertical-align: -4.0px;" /> worth of super-unleaded. To produce a dollar's worth of super-unleaded requires inputs of worth of regular, $0.17 worth of unleaded, and $0.11 worth of super-unleaded. In addition, the oil company has final demands for each of the different grades of gasoline. Find the coefficient matrix that would be used in determining the total output of each grade of gasoline.
A.
A =
B.
A =
C.
A =
D.
A =
Answer: C
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Solve.The long jump record, in feet, at a particular school can be modeled by 
where x is the number of years since the school was opened. What is the record for the long jump 
after the school opened? Round the answer to the nearest tenth.
A. 26.4 ft B. 22.8 ft C. 26.2 ft D. 26.6 ft
Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.
A. 
, x ? -6
B. x - 6, x ? 6
C. x + 6, x ? 6
D. 
, x ? 6
Use the function 
from 
to
src="https://sciemce.com/media/3/ppg__cognero__Chapter_13_Definite_Integrals_Techniques_of_Integration__media__f2e239db-92a9-4265-9569-01f834ec01d4.PNG" style="vertical-align:middle;" /> and n equal subintervals with the function evaluated at the right-hand endpoints of each subinterval. Let the sum of the areas of the rectangles be S. Find 
by using the formula for the sum of the areas of the n rectangles.
?
A. 10
B. 30
C. 60
D. 12
E. 14
Perform the indicated operation.12 tons 1330 lb + 3 tons 1859 lb
A. 16 tons 1189 lb B. 9 tons 1471 lb C. 8 tons 1471 lb D. 15 tons 1189 lb