The mean annual income for people in a certain city (in thousands of dollars) is 44, with a standard deviation of 41. A pollster draws a sample of 57 people to interview. What is the probability that the sample mean income is less than 41 (thousands of dollars)?

2,160 π

step-by-step explanation:

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.