Complete.18 L = 
mL
A. 0.018 mL
B. 1.8 mL
C. 1,800 mL
D. 18,000 mL
Answer: D
Mathematics
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (7 + t)i + (4 + ln(sec t))j - 10k, -?/2 < t < ?/2
A. T = (cos t)i - (sin t)j; N = (-sin t)i - (cos t)j B. T = (-cos t)i - (sin t)j; N = (-cos t)i + (sin t)j C. T = (-cos t)i - (sin t)j; N = (sin t)i - (cos t)j D. T = (cos t)i + (sin t)j; N = (- sin t)i + (cos t)j
Mathematics
Evaluate.i27 + i23
A. -2 B. -2i C. 0 D. 2
Mathematics
Solve the problem.pH = -log10[H+] Find the pH if the [H+] = 9.8 × 10-5.
A. 5.01 B. 4.01 C. 5.99 D. 4.99
Mathematics
Add.+ 
A. 1161.150 B. 1161.250 C. 1161.240 D. 1161.249
Mathematics