The distance to the surface of the water in a well can sometimes be found by dropping an object into the well and measuring the time elapsed until a sound is heard. if
t 1t1
is the time (in seconds) it takes for the object to strike thewater, then
t 1t1
obeys the equation
s equals 16 t subscript 1 superscript 2s=16t21,
where s is the distance (in feet). solving for
t 1t1,
we have
t 1 equals startroot s endroot divided by 4t1=s/4.
let
t 2t2
be the time it takes for the sound of the impact to reach your ears. since sound waves travel at a speed of approximately 1100 feet per second, the time to travel the distance s is
t 2 equals s divided by 1100.t2=s/1100.  
now
t 1 plus t 2t1+t2
is the total time that elapses from the moment that the object is dropped to the moment that a sound is heard. we have the equation
total elapsed time equals t 1 plus t 2 equals startfraction startroot s endroot over 4 endfraction plus startfraction s over 1100 endfraction

(i really need ) read the story problem, and then answer the questions that follow. gordon works for a graphic design firm and is creating a label for a food truck vendor. the vendor specializes in finger food and wants to sell food in right conical containers so that they are easy for people to hold. to complete his label, gordon needs to collect several different measurements to ensure that the label he designs will fit the surface of the container. gordon has been told that the containers have a diameter of 4 inches and a height of 6 inches. part a: find the slant height of the cone. the slant height is the distance from the apex, or tip, to the base along the cone’s lateral surface. show your work. part b: find the measure of the angle formed between the base of the cone and a line segment that represents the slant height. part c: imagine two line segments where each represents a slant height of the cone. the segments are on opposite sides of the cone and meet at the apex. find the measurement of the angle formed between the line segments.

An of a of 60. a of 36 is . isbe ?to .

Of jk j(–25, 10) k(5, –20). is y- of l, jk a 7: 3 ? a. –16 b.–11 c. –4 d.–1