Heidi has built a cubical water tank with lid for her house, with each outer edge 1.5m long. She gets the outer surface of the tank excluding the base covered with square tiles of side 25cm. Find much would she spend for the tiles, if the cost of tiles is Rs 360 per dozen.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

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For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')