Explain this bold statement: No matter what function f[x, y] you go with, if {xtrajectory[t], ytrajectory[t]} parameterizes a trajectory in the gradient field of f[x, y] , then you are guaranteed that f[xtrajectory[t], ytrajectory[t]] goes up as t goes up.

look at photo

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.

answer: given the scale 3,5 mm to 1 foot: so you know this and you need convert this 150mm to get the right answer.