Identify the type of surface represented by the given equation.
+ 
- 
= 1
A. Hyperboloid of one sheet
B. Elliptical cone
C. Ellipsoid
D. Hyperboloid of two sheets
Answer: A
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Simplify the polynomial by combining like terms if possible. Write the answer in descending order.5c2 + 7c3
A. 2c3 B. 7c3 + 5c2 C. 12c3 D. 12c2
Answer the following statement(s) true (T) or false (F)
By the time students arrive in middle school, teachers can reasonably expect that all of them will be able to solve simple fill-in-the-blank problems such as 3 + 5 = ___ + 7
Solve the problem.At a track meet with 135 participants, 25 participate in jumping events, 
of these jumpers are female, and 
of the total participants are female. What is the probability that a participant chosen at random is a jumper, given that the person is a female?
A. 
B. 
C. 
D. 
The amount of nitrogen dioxide, a brown gas that impairs breathing, present in the atmosphere on a certain May day in a city has been approximated by
?
?
where A(t) is measured in pollutant standard index (PSI), and ?t is measured in hours, with 
corresponding to 4 a.m. Use the trapezoidal rule with 
to estimate the average PSI between 4 a.m. and noon. Please round the answer to the nearest hundredth. (Hint: 
.)
?
A. 106.95 nitrogen dioxides
B. 108.79 nitrogen dioxides
C. 159.77 nitrogen dioxides
D. 102.79 nitrogen dioxides
E. 129.7 nitrogen dioxides