Solve the problem.As the temperature of a light bulb's filament changes from T1 to T2, the energy that the filament radiates changes by the quantity 
Multiply to find this change.
A. a
- a 
B. a
C. a
+ a 
D. a 
Answer: A
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Evaluate and simplify completely. Write your answer as a mixed number if possible.2
× 3
A. 7
B. 7
C. 6
D. 6
Solve the problem.Barbara knows that she will need to buy a new car in 5 years. The car will cost $15,000 by then. How much should she invest now at 5%, compounded quarterly, so that she will have enough to buy a new car? Round to the nearest cent.
A. $12,340.54 B. $11,193.23 C. $13,257.81 D. $11,700.13
Find dy for the given values of x and ?x.y = 
; x = 2, ?x = 0.1
A. 0.4 B. 4 C. 6 D. 0.6
Express the given logarithm as a sum and/or difference of logarithms. Simplify, if possible. Assume that all variables represent positive real numbers.log2
A. log2s - log215 - 
log2r
B. log215 + 
log2r - log2s
C. log215 ? 
log2m ÷ log2s
D. log2(15
) - log2s