Find an equation for the ellipse described.Center at (0, 0); focus at (0, 5); vertex at (0, 7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
Mathematics
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Compute the unit binormal vector and torsion of the curve. r(t) = 
A. B(t) = 
, ? = 1
B. B(t) = 
, ? = 0
C. B(t) = 
, ? = 1
D. B(t) = 
, ? = 0
Mathematics
Add or subtract as indicated. Write the answer in simplest form.
- 
A. 
B. 
C. 
D. 
Mathematics
Write the expression using exponents.
?
?
A. 
B. ?
C. ?
D. ?
Mathematics
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500
Mathematics