Write the domain and range of the function in interval notation.f(x) = x2 + 5
A. D: (-?, ?); R: [5, ?)
B. D: [-5, ?); R: (-?, ?)
C. D: (-?, ?); R: (-?, ?)
D. D: [5, ?); R: (-?, ?)
Answer: A
Mathematics
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Find k such that the function is a probability density function over the given interval.f(x) = kx3, 0 ? x ? 2
A. 
B. 
C. 
D. 
Mathematics
Find the unit tangent vector of the given curve.r(t) = (3t cos t - 3 sin t)j + (3t sin t + 3 cos t)k
A. T = (-3 sin t)j + (3 cos t)k
B. T = (3 cos t)j - (3 sin t)k
C. T = (-sin t)j + (cos t)k
D. T = - 
(sin t)j + 
(cos t)k
Mathematics
Solve the problem.Determine the slope function for the given function.f(x) = -6x + 7
A. s(x) = 7 B. s(x) = 6 C. s(x) = -6 D. s(x) = -7
Mathematics
Divide, when possible.231 ÷ 7
A. 36 B. 31 C. 33 D. 35
Mathematics