A rock is tossed into a lake and creates a ripple with a radius that increases at a rate of 20 cm/sec. The radius of the ripple can be expressed as the function R(t) = 20t, where t represents time in seconds. The area of the circle made by ripple can be expressed as
the function A(n) = Ter2, where r represents the radius in centimeters.
Which function can be used to determine the area of the ripple as a function of time?

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?