Find the indicated matrix.Let C = 
and D = 
. Find C - 3D.
A. 
B. 
C. 
D. 
Answer: D
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Find the surface area of the circular solid. Unless otherwise specified, use 3.14 for ? and round your answer to the nearest tenth.If the diameter of a sphere is 20 feet, find the surface area of the sphere. Give an exact answer.
A. 1600? square feet B. 800? square feet C. 400? square feet D. 1200? square feet
Eliminate the parameter. Write the resulting equation in standard form.A hyperbola: x = 1 + 6 sec t, y = 5 + 2 tan t
A. 
- 
= 1
B. 
+ 
= 1
C. 
- 
= 1
D. 
+ 
= 1
Solve.A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 8 days if it starts out at 64 grams?
A. 
gram
B. 
gram
C. 4 grams
D. 2 grams
Find the sum of the infinite geometric series.  figure 1.png)
What will be an ideal response?