Provide an appropriate response.Given matrix A:A = 
What is the size of A?
A. 3
B. 3 × 2
C. 3 × 3
D. 2 × 3
Answer: D
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Find the standard deviation of the data.The manager of a small dry cleaner employs six people. As part of their personnel file, she asked each one to record to the nearest one-tenth of a mile the distance they travel one way from home to work. The six distances are listed below. Find the standard deviation. Round to the nearest hundredth. 21.1 19.8 40.1 31.2 10.5 14.1
A. 3119.04 mi B. 3727.76 mi C. 11.03 mi D. 35.65 mi
Solve the problem.A card is drawn at random from a well-shuffled deck of 52 cards. What is the probability of drawing a face card or a spade?
A. 
B. 
C. 
D. 
Solve the problem.A baby weighed 8 pounds at birth and gained 2 pounds a month. How much did the baby gain in 3 months?
A. 30 lb B. 6 lb C. 13 lb D. 14 lb
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 15 ft from the light.
A. 2 foot-candles
B. 
foot-candle
C. 1
foot-candles
D. 
foot-candle