Outside at home there is a 6 key keypad with letters abc de that can be used to open the garage if the correct six letter code is entered each key may be used only once how many codes are possible

6C4 ways to choose the 4 letters.  4! ways to make a code of 4 letters. 6C4=15, 4!=24, and 15×24=360

dd

step-by-step explanation:

dd

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