Refer to the right triangle ABC with C = 90°.Assuming that a = 7 and c = 25, find b.
A. 24
B. 20
C. 625
D. 5
Answer: A
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (cosh t)i + (sinh t)j + tk
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k
B. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k
C. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k
D. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k
Is the following a statement? What is its truth value?Can you bring the book?
A. Statement. The truth value is true. B. Not a statement. The question cannot be answered true or false. C. Statement. The truth value is false.
Use the square root property to solve the equation. 7z2 - 28 = 0
A. {2} B. {2, -2} C. {15} D. {3, -3}
Use a formula to solve the problem.The area of a trapezoid is 76 square feet. If the bases are 5 and 14 feet, find the altitude of the trapezoid.
A. 16 ft B. 4 ft C. 1.5 ft D. 8 ft