Use the appropriate rounding rule to answer the question with the correct precision or correct number of significant digits.The average amount spent on food last year by the residents of your town was $3100 per person. The population of your town is 41,480. What was the total amount spent on food last year by the residents of your town?
A. $128,600,000
B. $129,000,000
C. $128,588,000
D. $130,000,000
Answer: D
Mathematics
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Solve the problem.A driver wants to gauge the fuel efficiency of her vehicle at speeds of 30 mph and above. She notices that traveling at an average speed of 40 mph results in a rating of 40 mpg, where as at an average speed of 50 mph, her car rates 35 mpg. Find an equation to model the gas mileage y for an average speed of x mph.
A. y = 2x + 60
B. y = 2x + - 20
C. y = -
x + - 20
D. y = -
x + 60
Mathematics
Make the conversion indicated. Round your result to the nearest tenth.45°C = 
°F
A. 138.6 B. 16.3 C. 113.0 D. 57.0
Mathematics
Use the square root property to solve the equation.3x2 + 21 = 0
A. {-i
, i
}
B. {-7i, 7i}
C. {-7, 7}
D. {-
, 
}
Mathematics
Divide.
A. 0 B. 1 C. -17 D. undefined
Mathematics