Cual es la unidad principal de longitud ¿cuales son sus multiplos y submultiplos?

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

Carli has 90 apps on her phone. braylen has half the amount of apps as theiss. if carli has three timesthe amount of apps as theiss, how many apps does braylen have? let b represent the number of braylen's apps and t represent the number of theiss's apps.