Provide an appropriate response.The life expectancy (in years) of a keyboard is distributed exponentially with k = 
. If the keyboard's warranty lasts 2 years, what is the probability that a keyboard will break down after the warranty expires?
Fill in the blank(s) with the appropriate word(s).
0.670
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Solve the problem. Round your answer to 2 decimal places when necessary.A six mile strip of Sprinkle Road had 48 traffic fatalities last year. There were 2.2 million miles driven along this stretch. Determine the traffic fatality rate per 100,000 miles driven.
A. 22 fatalities per 100,000 miles driven B. 2.18 fatalities per 100,000 miles driven C. 4583.33 fatalities per 100,000 miles driven D. 21.82 fatalities per 100,000 miles driven
Use cross products to determine whether the pair of fractions is equivalent.
and 
A. not equivalent B. equivalent
Solve the problem.An experienced accountant can prepare a tax return in 18 hours. A novice accountant can do the job in 24 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 72 hr
D. 
hr
Solve.The numerical difference between the area and circumference of a circle is 15? inches. Find the radius of the circle.
A. 6 in. B. 3 in. C. 5 in. D. 3 in. or 5 in.