Multiply and simplify. 
? 
A. 
B. 
C. 
D. 
Answer: A
You might also like to view...
Use l'H
pital's rule to find the limit.
A. 
B. 1
C. 0
D. ?
Determine whether the ordered pair is a solution of the system of equations. Remember to use alphabetical order of variables.(5, -2);5a+ 4b=1715a+ 12b=51
A. Yes B. No
Evaluate the expression for the given replacement values. Write the answer in simplest form.xy for x = 
, y = 
A. 
B. 
C. 
D. 
Solve the problem.The amount of energy collected by a solar panel depends on the intensity of the sun's rays and the area of the panel. Let the vector I represent the intensity, in watts per square centimeter, having the direction of the sun's rays. Let the vector A represent the area, in square centimeters, whose direction is the orientation of a solar panel. See the figure. The total number of watts collected by the panel is given by 
Suppose I = 
and A = 
style="vertical-align: -4.0px;" />. (i) Find 
and 
and interpret the meaning of each; (ii) Compute W and interpret its meaning; (iii) If the solar panel is to collect the maximum number of watts, what must be true about I and A? 
A. (i) 
= 0.081; the intensity of the sun's rays is approximately 0.081 W/cm2. 
= 583; the area of the solar panel is approximately 583 cm2.
(ii) W = 47; 47 watts of energy is collected.
(iii) Vectors I and A should be parallel with the solar panels facing the sun.
B. (i) 
= 0.057; the intensity of the sun's rays is approximately 0.057 W/cm2. 
= 400; the area of the solar panel is approximately 400 cm2.
(ii) W = 47; 47 watts of energy is collected.
(iii) Vectors I and A should be orthogonal with the solar panels at a 45° angle to the sun.
C. (i) 
= 0.081; the intensity of the sun's rays is approximately 0.081 W/cm2. 
= 583; the area of the solar panel is approximately 583 cm2.
(ii) W = 41; 41 watts of energy is collected.
(iii) Vectors I and A should be parallel with the solar panels facing the sun.
D. (i) 
= 0.007; the intensity of the sun's rays is approximately 0.007 W/cm2. 
= 340,000; the area of the solar panel is approximately 340,000 cm2.
(ii) W = 41; 41 watts of energy is collected.
(iii) Vectors I and A should be perpendicular with the solar panels at a 90° angle to the sun.