Ariana, boris, cecile, and diego are students in the service club. three of the four students will be chosen to attend a conference. which choice represents the sample space, s, for this event?
a. s = {abc, abd, acd, bcd}
b. s = {abc, bca, cda, dac}
c. s = {abc, abd, bac, bda, acd, adc, bcd, bdc}
d. s = {abc, abd, acd, bca, bcd, bdc, cab, cbd, dac, dbc}

A) S = {ABC, ABD, ACD, BCD}

Step-by-step explanation:

ON Edge 2020

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

the correct option is b

step-by-step explanation: