A drug company conducts trials of a new vaccine for a rare but usually fatal disease. The company creates a geometric model for this trial and establishes p=0.2 as the probability of success.
What can be said about this model?

Select all that apply.

1)The company predicts 4 failures before a success.

2)Each trial is independent.

3)The probability is the same for each trial.

4)The probability that the vaccine will be effective is p = 0.8.

5)Success is defined as preventing the disease.

6)The company predicts 8 failures before a success.

7)Success is defined as p = 0.2.

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