Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Answer: C
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Solve.John and Tony start from GraysLake at the same time and head for a town 10 miles away. John walks twice as fast as Tony and arrives 3 hours before Tony. Find how fast each walks.
A. Tony's speed = 
mph and John's = 
mph.
B. Tony's speed = 3 mph and John's = 6 mph.
C. Tony's speed = 
mph and John's = 
mph.
D. Cannot be determined with information given
Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. A certain radioactive isotope decays at a rate of 0.2% annually. Determine the half-life of this isotope, to the nearest year.
A. 3 years B. 347 years C. 250 years D. 151 years
Solve the equation.
- 
= 0
A. ? B. {-3, 4} C. {8, 4} D. {4}
Solve the differential equation using the method of undetermined coefficients.
