For the simple harmonic motion described by the trigonometric function, find the frequency per second.
?

?

A.
B.
C.
D.
E.

Answer: A

Mathematics

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Find the principal unit normal vector N for the curve r(t).r(t) = (9t sin t + 9 cos t)i  + (9t cos t - 9 sin t))k

A. N = - (cos t)i - (sin t)k
B. N = (cos t)i - (sin t)k
C. N = (-sin t)i - (cos t)k
D. N = (sin t)i + (cos t)k

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Mathematics

Graph the values of x that satisfy the given conditions.x ? 5 and x ? 1

A.

B.

C.

D.

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Convert the mass as indicated.1.102 decigrams to grams

A. 11.02 g B. 110.2 g C. 0.01102 g D. 0.1102 g

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First, round the mixed numbers to the nearest whole number and estimate the answer. Then find the exact answer and write it in simplest form.38 - 25

A. 12
B. 12
C. 11
D. 13

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Mathematics