FInd the tangential and normal components of the acceleration.r(t) = (t + 4)i + (ln(cos t) - 10)j + 2k
A. a = (sec t tan t)T - (sec t)N
B. a = (-sec t tan t)T - (sec t)N
C. a = (sec t tan t)T + (sec t)N
D. a = (-sec t tan t)T + (sec t)N
Answer: C
Mathematics
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Solve the problem.Suppose that 
= 7. Find 
and 
.
A. 1; -7 B. 1; 7 C. -1; -7 D. 0; 7
Mathematics
Find the focus and directrix of the parabola.x = 7y2
A. 
, x = 
B. 
, x = - 
C. 
, y = - 
D. 
, x = - 
Mathematics
Solve the initial value problem for x as a function of t.(t2 + 4t)
= 4x + 12, x(1) = 1
A. x = 
- 3
B. x = 20t + ln 
- 3
C. x = 
- 3
D. x = 20 ln
- 3
Mathematics
Answer the question or complete the sentence to make a true statement.Under what condition will the sum of a positive number and a negative number be positive?
What will be an ideal response?
Mathematics