A ball is thrown in the air such that its height, in meters, is modelled by the relation, h=-5(t-2)2+22, where t is time, in seconds, since ball was thrown.
a) How high is ball 3 seconds after thrown?
b) How high was ball above ground at moment it was released?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?