Find the average value of the function f over the given region.f(x, y) = 
over the square 1 ? x ? 2, 1 ? y ? 2.
A. 
B. 
C. 
D. 
Answer: D
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Measurements are made at two different times. Find the absolute change and then find the percentage change. Round answers to the nearest tenth if necessary.Last year the Mayor of the town of Little Heath had an approval rating of 
This year his approval rating had fallen to 
A. Absolute change: -48 percentage points Percentage change: -6.6% B. Absolute change: 48 percentage points Percentage change: 192% C. Absolute change: -48 percentage points Percentage change: -65.8% D. Absolute change: -48 percentage points Percentage change: -192%
The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 8 sin t - cos tFind the body's velocity at time t = ?/4 sec.
A. 
m/sec
B. - 
m/sec
C. 
m/sec
D. - 
m/sec
Find the zero of the linear function.f(x) = 3 - 7x
A. 
B. - 
C. 
D. - 
Answer the question about the given function.Given the function f(x) = 
, list the x-intercepts, if any, of the graph of f.
A. (-
, 0)
B. (3, 0)
C. (5, 0), (-5, 0)
D. none