A computer that costs $1099 last year cost $999 this year. What is the percent change

If tana tanb=k, show that(1+k)cos(a+b)=(1-k)cos(a-b)

You spin the spinner shown below once. each sector shown has an equal area. what is p(beaver ) p(beaver)? if necessary, round your answer to 2 2 decimal places.

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?