Solve the problem.In a transformer, an electric current in one coil of wire induces a current in a second coil. For a transformer, 
= 
where i is the current and t is the number of windings in each coil. In a neon sign amplifier, i1 = 1.6 A and the turns ratio 
= 150. Find i2 rounded to four decimal places, if necessary.
A. 94 A
B. 240 A
C. 0.0107 A
D. 1.0667 A
Answer: C
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Solve the problem.A recent survey revealed that 
of computer owners in a certain city have access to the Internet. Describe the population this statement is referring to.
What will be an ideal response?
Find an equation of the tangent line to the graph of the function f defined by the equation at the indicated point.
?
What will be an ideal response?
The volume V (in liters) of a certain mass of gas is related to its pressure P (in millimeters of mercury) and its temperature T (in degrees Kelvin) by the law
?
?
Compute 
and 
when T = 260 and P = 700.
?
A. 
The volume increases by 0.044 L when the temperature decreases by 1 degree (beyond 260 K) and the pressure is fixed at 700 mm of mercury. The volume decreases by 0.016 L when the pressure increases by 1 mm of mercury (beyond 700 mm) and the temperature is fixed at 260 K.
?
B.
The volume increases by 0.044 L when the temperature increases by 1 degree (beyond 260 K) and the pressure is fixed at 700 mm of mercury. The volume decreases by 0.016 L when the pressure increases by 1 mm of mercury (beyond 700 mm) and the temperature is fixed at 260 K.
?
C.
The volume increases by 0.044 L when the temperature increases by 1 degree (beyond 260 K) and the pressure is fixed at 700 mm of mercury. The volume increases by 0.016 L when the pressure increases by 1 mm of mercury (beyond 700 mm) and the temperature is fixed at 260 K.
?
D. ?
The volume increases by 0.044 L when the temperature increases by 1 degree (beyond 260 K) and the pressure is fixed at 700 mm of mercury. The volume increases by 0.016 L when the pressure increases by 1 mm of mercury (beyond 700 mm) and the temperature is fixed at 260 K.
?
Solve the problem.The surface area of a balloon is given by S(r) = 4?r2, where r is the radius of the balloon. If the radius is increasing with time t, as the balloon is being blown up, according to the formula 
find the surface area S as a function of the time t.
A. S(r(t)) = 
?t6
B. S(r(t)) = 
?t6
C. S(r(t)) = 
?t3
D. S(r(t)) = 
?t9