Find the center and the radius of the sphere that has the given equation.


Mathematics

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Find a formula for the nth term of the sequence.The sequence 7, -7, 7, -7, 7, . . . (7's with alternating signs)

A. an = 7(-1)n B. an = 7(-1)2n-1 C. an = 7(-1)2n+1 D. an = 7(-1)n+1

Mathematics

Provide an appropriate response.For the exponential function y = 4(1.4)x, answer the following.(a) Does the function represent exponential growth or decay?(b) Is the graph increasing or decreasing?

A. (a) exponential decay; (b) decreasing B. (a) exponential decay; (b) increasing C. (a) exponential growth; (b) increasing D. (a) exponential growth; (b) decreasing

Mathematics

Find a polynomial that represents the area of the figure.

A. 7x15 B. 10x8 C. 7x8 D. 10x15

Mathematics

Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = -4x4 - 5x3 - 9x2 - 3x + 8

A. 1 positive; 2 negative B. 0 or 2 positive; 0 or 2 negative C. 1 positive; 1 negative D. 1 positive; 1 or 3 negative

Mathematics