Provide an appropriate response.Suppose a radioactive substance has a half-life of 1000 years. What fraction will be left after 1000 years?
A. 4
B. 2
C. 
D. 
Answer: D
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?Which of the following is true about Similar Triangles?
A. ?If side a = 70", angle C = 55?, side b' = 80", then angle C' is 75?. B. ?If side a = 70", angle C = 55?, side b' = 80", then angle C' is 55?. C. ?If side a = 70", angle C = 55?, side b' = 80", then the triangles are not necessarily similar. D. ?If side a = 70", angle C = 55?, side b' = 80", then the triangles are similar. E. ?If side a = 70", angle C = 55?, angle B = 70?, then side A is the smallest side.
Solve the problem. Round to the nearest hundredth.What percent of 101 is 11.72?
A. 861.77% B. 0.09% C. 0.12% D. 11.60%
Divide.
A. -4 B. 3 C. -3 D. -2
The vertex of a parabola occurs where the derivative of its equation is 0, so an equation associated with the equation of a parabola can be solved to find the x-coordinate of the vertex. Find the vertex of the parabola, given the equation of the parabola and its associated equation.Equation of parabola: f(x) = -(7 + 8x + 3x2); associated equation: 0 = -8 - 6x
A. 
B. 
C. 
D. 