Express the value in scientific notation.

A. 15 × 1020
B. 15 × 1021
C. 4 × 1020
D. 4 × 1021

Answer: D

Mathematics

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Find the center, transverse axis, vertices, foci, and asymptotes of the hyperbola.(x - 3)2 - 25(y + 4)2 = 25

A. center at (3, -4)
transverse axis is parallel to y-axis
vertices at (3, -9) and (3, 1),
foci at (3, -4 - ) and (3, -4 + ),
asymptotes of y - 4 = - 5(x + 3) and y - 4 = 5(x + 3)
B. center at (-4, 3)
transverse axis is parallel to x-axis
vertices at (-9, 3) and (1, 3)
foci at (-4 - , 3) and (-4 + , 3)
asymptotes of y - 3 = - (x + 4) and y - 3 = (x + 4)
C. center at (3, -4)
transverse axis is parallel to x-axis
vertices at (-2, -4) and (8, -4)
foci at (3 - , -4) and (3 + , -4)
asymptotes of y + 4 = - (x - 3) and y + 4 = (x - 3)
D. center at (3, -4)
transverse axis is parallel to x-axis
vertices at (2, -4) and (4, -4)
foci at (3 - , -4) and (3 + , -4)
asymptotes of y + 4 = - 5(x - 3) and y + 4 = 5(x - 3)