Donna made $156 for 12 hours of work. at the same rate, how many hours would she have to work to make $221?​

Select the correct answer. in the figure, angle k measures 45°. what is the measurement of angle c? a. 38° b. 45° c. 90° d. 98°

Nine more than four times a number is the same as one less than twice the number. find the number?

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?