Which of the following is an advantage of using stratified random sampling? Stratified random sampling saves time and money.
Stratified random sampling requires knowledge of the entire population.
Stratified random sampling can be used even when there is not a list of the population.
Stratified random sampling provides more precise estimates than simple random sampling.

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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

fd

step-by-step explanation: