Me! i don't understand this! due todayas a part of an engineering contest, a student who has designed a protective crate for an egg drops a crate from a window 18 ft above the ground. the height (in feet) of the crate as it falls is given by h(t)=-16t^2+18, where t is the time (in seconds) since the crate was dropped. write and solve an equation to find the amount of time before the crate passes a window of 10 ft directly below the window from which the crate was dropped. write and solve an equation to find the amount of time before the crate hits the ground. is the rate at which the crate falls constant? explain.

Given: ad¯¯¯¯¯ is an altitude. prove: ab2+ac2=cb2 right triangle a b c with right angle a. point d lies on side b c and segment a d is drawn. angle a d c is a right angle. drag and drop a reason into each box to correctly complete the two-column proof. statement reason ad¯¯¯¯¯ is an altitude, and ∠bac is a right angle. given ∠adb and ∠adc are right angles. definition of altitude ∠bac≅∠bda ? ∠bac≅∠adc ? ∠b≅∠b ? ∠c≅∠c reflexive property of congruence △abc∼△dba ? △abc∼△dac aa similarity postulate abbd=cbab ? ab2=(cb)(bd) cross multiply and simplify. acdc=cbac polygon similarity postulate ac2=(cb)(dc) cross multiply and simplify. ab2+ac2=ab2+(cb)(dc) addition property of equality ab2+ac2=(cb)(bd)+(cb)(dc) substitution property of equality ab2+ac2=(cb)(bd+dc) ? bd+dc=cb segment addition postulate ab2+ac2=cb2 substitution property of equality