Solve the equation.
- 
= -4
A. 21
B. -21
C. -19
D. 19
Answer: C
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Solve.The annual depreciation rate r (0 < r < 1) of a car purchased for P dollars and worth A dollars after t years can be modeled by the following formula: 
Find the depreciated value of a car 5 years after it is purchased new for $30,000 if the depreciation rate is 21%. Round your answer to the nearest dollar.
A. $23,700 B. $9231 C. $12 D. $6300
Find the limit.
A. 1
B. ?
C. 0
D. 
Round the number to the place value indicated.
27
A. 800 B. 910 C. 900 D. 1000
During the construction of an office building, a hammer is accidentally dropped from a height of 16 ft. The distance the hammer falls in t sec is 
. What is the hammer's velocity when it strikes the ground? What is its acceleration?
?
The velocity is __________ ft per second.
?
The acceleration is __________ ft per second in the second power.
What will be an ideal response?