When Luke left his house in the morning, his cell phone battery was partially
charged. The charge remaining in Luke's battery, as a percentage, can be modeled by
the function B(t) = 54 – 4.5t, where t is the number of hours since Luke left his
house. What is the x-intercept of the function and what is its interpretation in the
context of the problem?
The x-intercept of the function is
which represents
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attempt i out of 2

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno step statement reason 1 ∠oln ≅ ∠lno given 2 draw oe as a perpendicular bisector to ln by construction 3 ∠leo ≅ ∠neo transitive property of equality 4 m∠leo = 90° definition of a perpendicular bisector 5 m∠neo = 90° definition of a perpendicular bisector 6 le ≅ en definition of a perpendicular bisector 7 δole ≅ δone side-angle-side (sas) postulate 8 ol ≅ on cpctc nina made two errors in the proof. identify and correct the errors.