Dawn is laying computer cables in the ceiling of a large building. A 175-ft cable to office B1 and a 420-ft cable to office B2 meet at a right angle. Offices B1 and B2 are both on the outer wall of the building. If Dawn lays one
cable from where the first two cables meet directly to the outer wall, how far will it be from there to office B1?
Round your answer to the nearest tenth.
A) 79.1 ft
B) 227.5 ft
C) 67.3 ft
D) 455.0 ft

Please work it out!

Asap! i'm not good math and i'm lost.

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.

If the regular price was $115, how much did jeanine pay for the hiking boots? jeanine bought a new pair of hiking boots on sale for 25% off the regular price. enter the correct answer. ooo done clestall the following formula describes this scenario: đoo s = r. 0.25 r = regular price s = sale price