Decide whether the situation involves permutations or combinations.A committee of 2 delegates chosen from a class of 28 students to bring a petition to the administration.
A. Permutation
B. Combination
Answer: B
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The following table shows average rice yield, in tons per hectare, in Asia t years since 1980.
510152025
3.323.613.733.954.11?
Use the average rate of change to estimate the yield in 1989.00.
?
A. 4.08 tons per hectare B. 3.55 tons per hectare C. 3.46 tons per hectare D. None of the above
Use the order of operations to evaluate each problem.
A. 13 B. 15 C. 16 D. 26
Solve the problem.The size P of a small herbivore population at time t (in years) obeys the function 
if they have enough food and the predator population stays constant. After how many years will the population reach 3000?
A. 5.96 yrs B. 9.66 yrs C. 28.83 yrs D. 11.77 yrs
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).x2 + y2 - 4x = 0
A. r sin2 ? = 4 cos ? B. r cos2 ? = 4 sin ? C. r = 4 sin ? D. r = 4 cos ?