Use identities to simplify the expression. Do not use a calculator.2 cos222.5° - 1
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the average rate of change of the area of a circle with respect to its radius r as r changes from 3 to 8 .
Find the average rate of change of the area of a circle with respect to its radius r as r changes from 3 to 8 .
Mathematics
Solve the equation.e5x - 1 = (e6)-x
A. 
B. {0}
C. 
D. 
Mathematics
Write decimal notation.- 
A. -0.019 B. -1.9 C. -190 D. -0.19
Mathematics
What is the rule in words? What is the output when the input is 100? Write the rule as an equation.
A) The output is five less than the input; 95; y = x-5
B) The output is seven less than the input; 93; y = x-7
C) The output is six less than the input; 94; y = x-6
D) The output is two less than the input; 98; y = x-2
E) The output is six less than the input; 94; y = x-6
Mathematics