Write as a decimal number rounded as indicated.
; Round to the nearest tenth.
A. 1.5
B. 0.55
C. 0.5
D. 1.8
Answer: C
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f(x) = 
x ? 0
A. f(x) is increasing on [?, 2?], [3?, 4?],...
f(x) is concave up on 
, 
, 
, . . .
B. f(x) is increasing on [0, ?], [2?, 3?],...
f(x) is concave up on 
, 
, 
, . . .
C. f(x) is increasing on [0, ?], [2?, 3?],...
f(x) is concave up on (0, ?), (2?, 3?), (4?, 5?), . . .
D. f(x) is increasing on 
, 
, 
, . . .
f(x) is concave up on [0, ?], [2?, 3?], . . .
Solve the problem.A particle moves along an ellipse in the xy-plane in such a way that its position at time t is 
Find the maximum and minimum values of 
and 
. (Hint: Find the extreme values of 
2 and 
2 first and take
square roots later).
A. 
min = 5; 
max = 8; 
min = 45; 
max = 72
B. 
min = 15; 
max = 24; 
min = 15; 
max = 24
C. 
min = 15; 
max = 24; 
min = 45; 
max = 72
D. 
min = 
max = 24; 
min = 
max = 72
Solve the problem.A 20-foot ladder is leaning against a house with the base of the ladder 3 feet from the house. How high up the house does the ladder reach? Round to the nearest tenth of a foot when appropriate. 
A. 19.8 ft B. 20.2 ft C. 17 ft D. 20 ft
Evaluate the expression.C(5, 5)
A. 0 B. 120 C. 1 D. 5