Find the exact circumference of the circle.Find the exact circumference.
A. 21.5? cm
B. 86? cm
C. 43? cm
D. 1849? cm
Answer: B
Mathematics
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Convert the radian measure to degrees. Round to the nearest hundredth if necessary.- 
A. -270.5° B. -270° C. -271° D. -269.5°
Mathematics
Solve each equation for x.
 FIGURE 1.png)
Mathematics
Answer the question.Which phrase correctly translates the expression 8 - x?
A. x minus 8 B. x less than 8 C. x take away 8 D. 8 subtracted from x
Mathematics
Solve the problem.The function A = A0e-0.00866x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are placed in the vault, how much time will need to pass for only 193 pounds to remain?
A. 110 yr B. 220 yr C. 120 yr D. 115 yr
Mathematics