Solve.A certain amount of money saved for 1 year at a certain annual interest rate (simple interest) yielded $16.20 in interest. If we had added $81 to the principal and reduced the interest rate by 1 percentage point(s), the interest would have been the same. Find the principal and the rate.
A. $1616.00, 5%
B. $324.00, 5%
C. $8.17, 19.83%
D. $1616.00, 4%
Answer: B
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Graph the solution set of the system of inequalities.
x + 
y ? 33x - 5y ? -15
A. 
B. 
C. 
D. 
Graph the function.f(x) = 
A. 
B. 
C. 
D. 
Write down all the subsets of the given set.{4, ?, 8, ?}
A. {4}, {?}, {8}, {?}, {4, ?}, {4, 8}, {4, ?}, {?, 8}, {?, ?}, {8, ?}, {4, ?, 8}, {4, ?, ?}, {4, 8, ?}, {?, 8, ?}, ? B. {4}, {?}, {8}, {?}, {4, ?}, {4, 8}, {4, ?}, {?, 8}, {?, ?}, {8, ?}, {4, ?, 8}, {4, ?, ?}, {4, 8, ?}, {?, 8, ?}, {4, ?, 8, ?}, ? C. {4}, {?}, {8}, {?}, {4, ?}, {4, 8}, {4, ?}, {?, 8}, {?, ?}, {8, ?}, {4, ?, ?}, {4, 8, ?}, {?, 8, ?}, {4, ?, 8, ?}, ? D. {4}, {?}, {8}, {?}, {4, ?}, {4, 8}, {4, ?}, {?, 8}, {?, ?}, {8, ?}, {4, ?, 8}, {4, ?, ?}, {4, 8, ?}, {?, 8, ?}, {4, ?, 8, ?}
Use a graphing calculator to find the sum.
Round your answer to three decimal places.
A. 0.667 B. 3.999 C. 4.001 D. 1.333