h(t)= -0.17 t2 + 187t + 61,000, where h is the altitude in meters and t is flight time in seconds. a. Approximately how long did the flight last?

Let w=23 . what is the value of w + 45 ?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?