Solve.A box of matches contains 210 matches. If a carton contains 10 boxes of matches, how many matches are in a carton?
A. 220 matches
B. 21 matches
C. 2100 matches
D. 210 matches
Answer: C
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Solve.5x(8x - 5) = 0
A. x = 
, 
, 0
B. x = 
, 
C. x = 
, 0
D. x = - 
, 0
Rationalize the denominator of the expression. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
- 
D. 
?The capitalized cost C of an asset is given by 
where 
is the original investment, t is the time in years, r is the annual interest rate compounded continuously, and
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?
, 
, 
?
A. ?
?a. 
, 
b. 
, 
c. 
, 
?
B. ??
a.
, 
b. 
, 
c. 
, 
?
C. ?
??a.
, 
b. 
, 
c. 
,
?
D. ??
a.
, 
b. 
,
c. 
,
?
E. ??a.
, 
b. 
,
c. 
, 
The arch of the underpass in the picture is a part of an ellipse. Find the equation of the arch.
A. 
B. 
C. 
D. 
E. 