? dx
What will be an ideal response?
x +C
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Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Solve the problem.Use the formula R = log
, where the magnitude of an earthquake on the Richter scale is based on I, the measurement of a seismic wave, and I0, the measurement of a seismic wave of a level zero earthquake with the same epicenter. An earthquake was recorded which was 2,511,886 times more powerful than a reference level zero earthquake. What is the magnitude of this earthquake? (Round to the nearest tenth.)
A. 6.4 B. 5.4 C. 14.7 D. 0.6
A geometric sequence is given. Find the common ratio and write out the first four terms.{tn} = 
A. r = 
; t1 = 
, t2 = 
, t3 = 
, t4 = 
B. r = 
n; t1 = 
, t2 = 
, t3 = 
, t4 = 
C. r = 
; t1 = 
, t2 = 
, t3 = 
, t4 = 
D. r = 
n; t1 = 
, t2 = 
, t3 = 
, t4 = 
Use a calculator to find the following. Round your answer to four places past the decimal point. ? sec 47.9° ?
A. 1.5806 B. 1.4246 C. 1.4916 D. 1.6366 E. 1.3686