How to get a plane equation perpendicular to other plane

Jada has a monthly budget for her cell phone bill. last month she spent 120% of her budget, and the bill was 60$. what is jada’s monthly budget

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

You’re giving a cube with a length of 2.5 cm and a width of 2.5 cm and a high of 2.5 cm you place it on a scale and it is 295 g calculate the density