Given the radius and area of the circle, calculate the angle at the centre of the circle. Radius : 8.4 cm
Area of the circle : 15.4 cm^2​

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What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =