What is 5+2? Ive been totally stuck on this for the longest time. I really need help

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d

Percent increase and decrease. original number: 45 new number: 18