Convert the rectangular equation to polar form.x2 + y2 - 4x = 0
A. r = 
B. r = 
C. r = 4 cos ?
D. r = 4 sin ?
Answer: C
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A child is 22 inches long at birth and grows to an adult height of 70 inches.
?
?
A: Make a logistic model of the height H, in inches, at age t years. Note: Thus far you are not given sufficient information to determine the value of r in the expression 
. Just leave that term as a variable.
?
B: In the model from part A we think of restricting the age to 15. That corresponds to putting 
in the formula, so H is a function of r. Make a graph of H versus r with . You may assume that r is no larger than 1.
?
C: Use your graph in part B to determine for what value of r the person will reach 90% of adult height at age 15.
?
D: Use the information you found in part C to make a logistic model of height versus age.
?
Round your answers to two decimal places, if necessary.
What will be an ideal response?
Find the area of the surface generated when the given curve is revolved about the y-axis.y = 
, for 8 ? x ? 10
A. 4?(263/2 - 173/2)
B. 
(113/2 - 103/2)
C. 
(263/2 - 173/2)
D. 
(263/2 - 173/2)
Express the interval in set builder notation and graph the interval on a number line.[1, ?)
A. {x 
}
B. {x 
}
C. {x 
}
D. {x 
}
Write the decimal number that has the specified place values.9 tens, 8 hundredths, 2 ones, 3 thousandths, 2 hundreds, 8 tenths
A. 292.0883 B. 3,292.88 C. 892.823 D. 292.883