The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (10 sin 5t)i - (7 cos 5t)j + (10 csc 5t)k
A. a
= 175j + 250k
B. a
= -250i - 250k
C. a
= -250i + 250k
D. a
= 250i + 250k
Answer: C
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Tell if the square root is rational, irrational, or not a real number. If the square root is rational, find the exact value; if the square root is irrational, write the approximative value rounded to 2 decimal places.
A. irrational, 7.94
B. rational, 3
C. not a real number
D. irrational, -7.94
Find the sum of the geometric series.
A. 5140 B. 40 C. 264 D. 2728
Solve the equation. Express radicals in simplest form.n2 = -289
A. {-17} B. {17} C. {-17, 17} D. ?
If the following is a polynomial function, then state its degree and leading coefficient. If it is not, then state this fact.f(x) = -18 - 19x4 - 17x - 8x3 - 13x2
A. Degree: 4; leading coefficient: -18 B. Degree: 4; leading coefficient: -19 C. Degree: -18; leading coefficient: -19 D. Not a polynomial function.