Add or subtract. Then simplify by collecting like radical terms, if possible. Assume that no radicands were formed by raising negative numbers to even powers.4
- 2
+ 8
A. 172
B. -172
C. 60
D. 4
Answer: C
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The concentration C, in milligrams per deciliter, of a drug in the bloodstream t hours after an injection is given by
.
?
A: Make a graph of C versus t over the first 10 hours since the injection.B: The drug is effective as long as the concentration is 50 milligrams per deciliter or higher. Add to your graph the horizontal line 
.C: During what time period is the drug effective? Round your answer to two decimal places.
What will be an ideal response?
Perform the indicated operation.3 - 12
A. -9 B. 9 C. 15 D. -15
If a tree casts a shadow of 5 ft 8 in. at the same time that a 6-ft 11-in. person casts a shadow of 4 ft 2 in., find the height of the tree (to the nearest inch). ?
A. 8 ft 4 in. B. 11 ft 6 in. C. 9 ft D. 9 ft 5 in. E. 9 ft 4 in.
Find f such that the given conditions are satisfied.f'(x) = 
- 
, f(0) = 4
A. f(x) = x3/2 - 2
+ 4
B. f(x) = 
x2 - 2
C. f(x) = 
x3/2 - 2
+ 4
D. f(x) = 
x3/2 - 
+ 4