Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.-(-9)0
A. -1
B. 1
C. 0
D. 9
Answer: A
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Provide an appropriate response.Use the Intermediate Value Theorem to prove that 7 sin x = x has a solution between 
and ?.
What will be an ideal response?
The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (5t - 4t3)i + 4 tan (3t)j + e2tk
A. a
= 2?i + 144j + 4e(1/6)?k
B. a
= - 2?i - 144j + 4e(1/6)?k
C. a
= - 2?i - 144j + 4k
D. a
= - 2?i + 144j + 4e(1/6)?k
Solve the equation. Leave your answer in exact form. Do not approximate.ex + 3 = 7
A. x = ln 7 - 3 B. x = ln 10 C. x = e7 + 3 D. x = e21
The sizes of two matrices A and B are given. Find the sizes of the product AB and the product BA, whenever these products exist.A is 2 × 3, and B is 2 × 3.
A. 3 × 2; 2 × 3 B. 2 × 3; 3 × 2 C. 2 × 2; 3 × 3 D. AB does not exist; BA does not exist.