A pyrotechnic display is fired upward with an initial velocity of 53 feet per second. Its height h, in feet, after t seconds (until it hits the ground) is given by
.
?
A: Make a graph of H versus t.B: The device is visible when it is 27 feet high or higher. Add the graph of 
to the graph you made in part A.C: During what time period will the display be visible?
What will be an ideal response?
?
??
B:
?
?
C: From 
seconds to 
seconds
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Solve. Round to the nearest hundredth, if necessary.According to Ohm's law, the electric current I, in amperes, in a circuit varies directly as the voltage V. When 17 volts are applied, the current is 4 amperes. What is the current when 21 volts are applied?
A. 4.94 amperes B. 42 amperes C. 4.25 amperes D. 89.25 amperes
Complete.2 mi = 
yd
A. 2,000
B. 10,560
C. 
D. 3,520
Provide an appropriate response.What was the rate of increase of inflation if an object that originally cost $750 now is priced at $824 due to inflation?
A. 1.099% (rounded) B. 9.1% (rounded) C. 9.9% (rounded) D. 91.02% (rounded)
Solve the problem.The cost to rent a power-wash machine from the hardware store depends on the number of hours the machine is rented. It costs $52 to rent the machine for 2 hours, and it costs $156 to rent it for 6 hours.(i) Write a linear equation giving the cost, y, in terms of the number of hours x.(ii) Use the equation found in part a to find how much it costs to rent for 12 hours.(iii) How many hours could you rent for a cost of $624?
A. (i) y = 26x (ii) $312 (iii) 24 hours B. (i) y = 25x (ii) $300 (iii) 23 hours C. (i) y = 28x (ii) $336 (iii) 24 hours D. (i) y = 27x (ii) $324 (iii) 25 hours