Subtract. Simplify, if possible.
- 
A. 
B. 
C. 
D. 
Answer: B
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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. 347 years B. 3 years C. 250 years D. 151 years
Provide an appropriate response.Find the approximate cost by rounding to a single digit and then find the exact cost of 12 cans of cat food if each can costs $0.49.
A. $6; $5.88 B. $5; $5.88 C. $5; $5.78 D. $6; $5.78
Determine whether the scatter diagram indicates that a linear relation may exist between the two variables. If a linear relation does exist, indicate whether the slope is positive or negative.
A. Linear with negative slope B. Nonlinear C. Linear with positive slope
If a tree casts a shadow of 11 ft at the same time that a 6-ft person casts a shadow of 2 ft, find the height of the tree (to the nearest foot). ?
A. 33 ft B. 6 ft C. 2 ft D. 17 ft E. 11 ft