Use the explicit or recursive formulas for the geometric sequence 45, 135, 405, 1215, 3645, ... to find the sum of the first 9 terms of the sequence.

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.

the answer is d

for problems like this theres an app, its photomath that explains the problem and gives the answer hope i

question: use the following table of a school bus during morning pickups to calculate its average speed between 2.8 km and 4.2 km

answer: 42 km/h

explanation: 1.4/0.033 42.42424 = 42 km/h

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(jacemorris04)