Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x| ? 0.1, |y| ? 0.1, |z| ? 0.1
A. |E| ? 9.8821
B. |E| ? 11.4193
C. |E| ? 9.2233
D. |E| ? 10.5409
Answer: A
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Use the quadratic formula to solve the equation.x2 - 
x = - 
A. {
, 
}
B. 
C. 
D. {
, 
}
Simplify.
A. 3k2 B. 12 C. 12k2 D. 3k
Determine the x- and y-intercepts on the graph of the equation.y = 11(x + 1) - 1
A. x-intercept is - 
; y-intercept is 10
B. x-intercept is 
; y-intercept is 10
C. x-intercept is 10; y-intercept is 12
D. x-intercept is - 
; y-intercept is -10
Solve the problem.Sandy manages a ceramics shop and uses a 
kiln to fire ceramic greenware. After turning off her kiln, she must wait until its temperature gauge reaches 
before opening it and removing the ceramic pieces. If room temperature is 
and the gauge reads 
in 13 minutes, how long must she wait before opening the kiln? Assume
the kiln cools according to Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to the nearest whole minute.) A. 381 minutes B. 105 minutes C. 68 minutes D. 567 minutes