Solve the problem. Round to the nearest hundredth.46% of what number is 80?
A. 173.91
B. 0.58
C. 1739.10
D. 58.00
Answer: A
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Provide an appropriate response. Find the slope of the line that passes through the points (1, -9) and (11, 6).
A. - 
B. 
C. 
D. - 
Solve the 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 ft from a light is 2 foot candles, find the intensity on a screen 20 ft from the light.
A. 1
foot-candles
B. 
foot-candle
C. 2 foot-candles
D. 
foot-candle
Provide an appropriate response.
=
A. 
B. 
C. 2
D. 4
E. - 
Ions are atoms or groups of atoms with positive or negative electrical charges. The charges of some ions are given. Use this information to find the total charge. 
2 borate ions and 9 sodium ions
A. -25 B. +15 C. +3 D. -15