Use the even-odd properties to find the exact value of the expression. Do not use a calculator.cos (-60°)
A. - 
B. 
C. 
D. - 
Answer: C
Mathematics
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Solve.Suppose that an estimated 8750 gigatons of mass of a certain ice sheet has been lost since the beginning of the 20th century. Given that a gigaton is 1012 metric tons, and a metric ton is 1000 kilograms, convert this loss to U.S. customary tons. Express your answer in scientific notation to three decimal places.
A. 8.750 × 1015 tons B. 8.750 × 1012 tons C. 9.645 × 1012 tons D. 9.645 × 1015 tons
Mathematics
Solve the rational equation.
- 
= 
A. {-42} B. {-7} C. {-66} D. {7}
Mathematics
Graph the solution set to the inequality.y ? 6x
A. 
B. 
C. 
D. 
Mathematics
Use the remainder theorem and synthetic division to find f(k).k = 2; f(x) = -x3 - 2x2 + 4
A. 9 B. 12 C. -12 D. 3
Mathematics