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Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Given abcd ac=38 and ae=3x+4 find the value of x

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin