Justin threw a football to his friend, and the height of the football in meters above the ground after t seconds is modeled by f(t)=-4.9t²+30t+13. When did the football hit the ground? 58.92 sec

6.53 sec

3.06 sec

13 sec

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?