Which of the following vectors sre orthogonal to (2,1)? check all that apply a. (-2,-3) b. (1,2) c. (-3,6) d. (1,-2)

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

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?

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable