Find the infinite sum accurate to 3 decimal places.
A. 0.143
B. 0.200
C. -0.571
D. 0.800
Answer: B
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Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 93% of the isotope left?
A. 363 years B. 253 years C. 350 years D. 700 years
Multiply.(4r + 3s)(4r - 3s)
A. 16r2 - 9s2 B. 16r2 + 24rs - 9s2 C. 4r2 - 24rs - 9s2 D. 16r2 - 24rs - 9s2
Evaluate.
- 
A. - 
B. 
C. - 
D. 
Solve the problem.When exposed to ethylene gas, green bananas will ripen at an accelerated rate. The number of days for ripening becomes shorter for longer exposure times. Assume that the table below gives average ripening times of bananas for several different ethylene exposure times. 
Plot the data and then find a line approximating the data. With the aid of this line, determine the rate of change of ripening time with respect to exposure time. Round your answer to two significant digits. 
A. 
-0.15 day per minute
B. 
-6.7 days per minute
C. 
38 minutes
D. 
5.6 days