Solve the problem. Round to the nearest tenth.Find the percent increase (or decrease) in net sales from last year to this year for the income statement. 
A. 6.3% decrease
B. 6.9% increase
C. 6.3% increase
D. 6.9% decrease
Answer: C
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 2sec2(t)i - 2tan(t)j + 9t2k
A. v
= 8i + 4j - 
?k
B. v
= 8i - 4j + 
?k
C. v
= -4j - 
?k
D. v
= -4j + 
?k
Mathematics
Write the number in trigonometric form. Let 0 ? ? < 2?.7i
A. 7(cos 0 + i sin 0)
B. 7(cos 
+ i sin 
)
C. 7(cos ? + i sin ?)
D. 7(cos 
+ i sin 
)
Mathematics
Solve the equation in the interval [0, 2?). sin x = cos 2x
 figure 1.png)
Mathematics
The boat swim y miles downstream in 5 hours. The speed of the boat in still water is 24 mph. Write the a linear equation that represent how distance depends from the speed of stream x.
A. y = 5x + 120 B. y = 5x + 24 C. y = 120x + 5 D. y = 24x + 120
Mathematics