Solve the problem.A coil of wire rotating in a magnetic field induces a voltage given by 
where t is time in seconds. Find the smallest positive time to produce a voltage of 10
.
A. 3.33 sec
B. 3? sec
C. 3 sec
D. 3.33? sec
Answer: A
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Solve the problem.A person ordering a certain model of car can choose any of 9 colors, either manual or automatic transmission, and any of 8 audio systems. How many ways are there to order this model of car?
A. 152 B. 144 C. 140 D. 154
Solve the problem.Let the supply and demand functions for a certain model of electric pencil sharpener be given by p = S(q) = 
q and p = D(q) = 18 - 
q ,where p is the price in dollars and q is the quantity of pencil sharpeners (in hundreds). Graph these functions on the same axes (graph the supply function as a dashed line and the demand function as a solid line). Also, find the equilibrium quantity and the equilibrium price.
A. 
Equilibrium quantity: 1080
Equilibrium price: $7.20
B. 
Equilibrium quantity: 720
Equilibrium price: $10.80
C. 
Equilibrium quantity: 950
Equilibrium price: $7
D. 
Equilibrium quantity: 900
Equilibrium price: $6
Simplify the expression using the order of operations.8 ? 7 - 30 ÷ 5
A. 62
B. 50
C. 
D. 0
Determine whether the equation is a function.y = 5x2 - 6x + 9
A. function B. not a function