The magnitude on the Richter scale of an earthquake is given by the equation  figure 1.png)
where E is the energy released by the earthquake, measured in joules, and E? is the energy released by a very small reference earthquake, standardized at E? = 10^4.40 joules.
An earthquake has an energy release of 4.34 × 10? joules. What was its magnitude on the Richter scale?
A) 2.5 B) 2.6 C) 2.7 D) 2.8
D) 2.8
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Provide an appropriate response.Perform the indicated operation and simplify: 
Fill in the blank(s) with the appropriate word(s).
Find an equation for the circle.Center at (3, 0), radius 9
A. (x - 3)2 + y2 = 81 B. (x + 3)2 + y2 = 81 C. x2 + (y + 3)2 = 9 D. x2 + (y - 3)2 = 9
Find the quotient and the remainder.x4 + 8x2 + 9 divided by x2 + 1
A. x2 + 7x + 
; remainder 0
B. x2 + 7x + 1; remainder 2
C. x2 + 7; remainder 0
D. x2 + 7; remainder 2
Solve the problem.Write an equation in standard form of the parabola that has the same shape as the graph of f(x) = 11x2, but which has its vertex at (3, 7).
A. f(x) = 11(x - 3)2 + 7 B. f(x) = 11(x + 3)2 + 7 C. f(x) = 11(x + 7)2 + 3 D. f(x) = (11x + 3)2 + 7