Let P=(0,0,1),Q=(1,−1,1),R=(−2,1,−1). Find (a) The area of the triangle PQR.

area =

(b) The equation for a plane that contains P, Q, and R.

This plane is

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%

Whoever gets this right gets the ! the half life of a soul smelling substance is 4 years. if you have 8 oz of this strange substance, how much of it will you have after 20 years? show work.