Find a formula for a n for the arithmetic sequence.

a 1 = 7, d = –8



a.

b.

c.

d.

a.

Mathematics

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Find the curvature of the curve r(t).r(t) = (9t + 8)i - 4j + (9 - t2)k

A. ? = 
B. ? = 9
C. ? = 93/2
D. ? = 

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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 

A. -14 B. -5 C. 0 D. 1

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Provide an appropriate response.Find ? if cos ? = 0.6896 rounded to the nearest tenth of a degree.

A. 0.8° B. 42.6° C. 34.6° D. 46.4°

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Round the whole number to its highest place value.8178

A. 8100 B. 8000 C. 7900 D. 9000

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