Express in terms of i.
A. ±5
B. 5i
C. -5i
D. -i
Answer: B
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Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at 
and 
. The cross sections perpendicular to the x-axis between these planes are squares whose bases run from the parabola 
to the parabola 
.
A. 1568 B. 1536 C. 784 D. 196
Find dy.y = 9
+ 
A. 
dx
B. 
dx
C. 
dx
D. 
dx
Use negative exponents where necessary to write the expression with all variables in the numerator of a term. That is, write each term in the form cxn if the term contains a variable.y = 7x2 + 5 - 
+ 
A. y = 5 - 3x-1 + 10x-2 B. y = 7x2 + 5 - (3x)-1 + (3x)-2 C. y = 7x2 + 5 + x-1 + x-2 D. y = 7x2 + 5 - 3x-1 + 3x-2
Translate the percent equation into an English sentence.9% ? 42 = x
A. 9% of what number is 42? B. 42 is 9% of what number? C. 9 is what percent of 42? D. 9% of 42 is what number?