Solve the variation problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 feet from a light is 3 foot candles, find the intensity on a screen 20 ft from the light.
A. 
foot-candles
B. 
foot-candles
C. 2 foot-candles
D. 1
foot-candles
Answer: A
Mathematics
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Rewrite the statement using mathematical symbols.P is the set of even numbers less than 30 and more than 20.
A. P = {22, 24, 26, 28} B. P = {20, 22, 24, 26, 28} C. Q = {20, 22, 24, 26, 28, 30} D. Q = {22, 24, 26, 28, 30}
Mathematics
The symmetric property of congruence allows us to conclude that if AB ? PQ, then
(a) PQ ? AB (b) PQ ? PQ (c) AB ? AB (d) All of these follow from the symmetric property. (e) Both (b) and (c) follow from the symmetric property.
Mathematics
Multiply.
A. 1206 B. 1186 C. 1196 D. 1296
Mathematics
Find the area of the region under the graph of the function
?
?
on the interval 
.
Fill in the blank(s) with the appropriate word(s).
Mathematics