Which type of number is ?
a. Rational number
b. Irrational number
c. Natural number
d. Whole number
a. Rational number
The number is a rational number.
Mathematics
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Find the length of the parametric curve defined over the given interval.x = cos t, y = ln(sec t + tan t) - sin t, 0 ? t ? 
A. ln 
- ln 2
B. ln 2 - ln 
C. 
D. ln 2 + 
Mathematics
Sketch the surface z = f(x,y).f(x, y) = x2
A. 
B. 
C. 
D. 
Mathematics
Write a different inequality with the same meaning.x < -10
A. -10 > x B. x ? -10 C. -10 ? x D. x > -10
Mathematics
Determine a formula for the exponential function.
A. f(x) = 17.15 ? 1.3x B. f(x) = 35 ? 0.7x C. f(x) = 17.15 ? 0.7x D. f(x) = 24.5 ? 1.7x
Mathematics