Find the linear equation that is the straight line through 
with slope 
.
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
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Find 
.y =log7
A. 
B. 
(sec x csc x - ln 3 -1)
C. 
(cot x - tan x - ln 3 -1)
D. e7(cos x - sin x - ex3x)
For certain ships the diameter d, in feet, of the propeller depends on the maximum revolutions per minute r the propeller turns. The relation is given by
.
A: Make a graph of d versus r. Include up to 200 maximum revolutions per minute.B: What diameter corresponds to a maximum revolutions per minute of 109?C: What maximum revolutions per minute corresponds to a diameter of 20 feet?
?
Round your answer to two decimal places if necessary.
?
What will be an ideal response?
Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with vertices (0, ±9) and foci at 
.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
In 
, radius 
chord 
style="vertical-align:-2px;" /> at point C. If OD = 5 and AB = 8, find OC.
A. 3
B. 3.5
C. 
D. 4