Find the exact answer.At SuperStop, gasoline costs 
per gallon when you pay with a credit card and 
gallon less when you pay with cash. How much do you save by filling up a 
tank if you are paying cash?
A. $54.30
B. $1.20
C. $12.00
D. $53.10
Answer: B
Mathematics
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Find the focus and the directrix of the parabola.y = x2 + 14x + 50
A. Focus: 
; directrix: y = 1
B. Focus: 
; directrix: y = 
C. Focus: 
; directrix: x = 1
D. Focus: (-7, 2); directrix: y = 0
Mathematics
Solve.A storehouse stores 550 different inventory items. 
of these items are perishable. How many of the inventory items are perishable?
A. 440 items B. 444 items C. 436 items D. 110 items
Mathematics
Solve.35.5% of 3,600 is what?
A. 2,322 B. 2,342 C. 1,278 D. 1,800
Mathematics
Solve the problem.Find the tangent to y = cos x at x = 
.
A. y = - x + 
B. y = 1
C. y = x + 
D. y = - x - 
Mathematics