Parametrize the surface S.S is the lower portion of the sphere x2 + y2 + z2 = 49 cut by the cone z = 
.
What will be an ideal response?
Answers will vary. One possibility is r = 7 cos ? sin ?i + 7 sin ? sin ?j + 7 cos ?k, 
Mathematics
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Solve the problem. Round to the nearest cent unless otherwise noted.The regular selling price of a store item is $288. For a special year-end sale the price is marked down 20%. Find the discount sale price.
A. $230.40 B. $345.60 C. $57.60 D. $240.00
Mathematics
Rephrase the statement in the requested symbolic form.contrapositive of a ? ~(b ? c)
A. (b ? c) ? ~a B. ~a ? (b ? c) C. ~a ? ~(b ? c) D. ~(b ? c) ? a
Mathematics
Provide an appropriate response.What is the period of the function y = 
cos 
?
A. 120°
B. 180°
C. 
D. 3
Mathematics
Add or subtract as indicated.6
+ 9
- 11
A. 15
- 11
B. 4
C. -3
- 11
D. 26
Mathematics