Complete the identity.2 tan ? - (1 + tan ?)2 = ?
A. 0
B. -sec2 ?
C. 1 - sin ?
D. 1
Answer: B
Mathematics
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Evaluate the integral by using multiple substitutions.
dt
A. 
+ C
B. - 
+ C
C. - 
+ C
D. 
+ C
Mathematics
The histogram shows the scores of each participant in a game from a total of 100 participants. 
What is the ratio of participants who score 80-99 to the total number of participants?
A. 
B. 
C. 
D. 
Mathematics
Write the decimal in words.0.99
A. ninety-nine ten-thousandths B. ninety-nine tenths C. ninety-nine hundredths D. ninety-nine thousandths
Mathematics
Solve the exponential equation. Round to three decimal places when necessary.e-0.12t = 0.19
A. -11.779 B. 13.839 C. -20.59 D. 10.601
Mathematics