Solve the problem.A reflecting telescope contains a mirror shaped like a paraboloid of revolution. If the mirror is 20 inches across at its opening and is 5 feet deep, where will the light be concentrated?
A. 0.6 inches from the vertex
B. 0.4 inches from the vertex
C. 5 inches from the vertex
D. 1.3 inches from the vertex
Answer: B
Mathematics
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Answer the question.A square has the properties of which three quadrilaterals?
What will be an ideal response?
Mathematics
Fill in the blank with <, >, or = to make a true comparison statement. -0.27 _____ -0.23
A. > B. < C. =
Mathematics
Solve the problem.The product of 16 and the square root of some number is equal to that number decreased by 512. Find the number.
A. 768 B. 512 C. 2048 D. 1024
Mathematics
If possible, factor the polynomial completely. If a polynomial cannot be factored, state that it is prime.36a2 - 3a - 3
A. (12a + 3)(3a - 1) B. 3(4a - 1)(3a + 1) C. (4a + 1)(9a - 3) D. 3(4a + 1)(3a - 1)
Mathematics