Solve the problem.A nuclear cooling tower cross section is a hyperbola having a diameter of 60 ft at the center. The distance between the two foci is 90 ft. Find a Cartesian equation for the hyperbola?
A. 
- 
= 5
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: C
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Solve the problem.Evaluate 
at t = 9 for the function w = exyz2; x = t, y = t, z = 
.
A. 
e
B. - 
e
C. 0
D. 
Provide an appropriate response.Arrange the quadratic equation in standard form: 8 = 4x2 - x
A. 4x2 = x + 8 B. 4x2 - x = 8 C. -4x2 + x + 8 = 0 D. 4x2 - x - 8 = 0
Solve the problem.A person puts $22 into a bank account on January 1, $27 on February 1, $32 on March 1, and so forth. How much has the person put into the bank account by December 30?
A. $1188 B. $594 C. $624 D. $462
Use the Pythagorean theorem to find the missing side of the right triangle with legs a and b, and hypotenuse c. Approximate values to the nearest tenth when appropriate.a = 12 in., b = 20 in.
A. 23.3 in. B. 272 in. C. 16 in. D. 544 in.