21 All else being equal, a study with which of the following erronges would be
the most reliable?
A. 215 percentage points
B, 210 percentage points
C, 25 percentage points
OD, 220 percentage points

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Asap 40 pts + brainliest to right/best answer only answer if you know for sure

Ineed asap solve. 2a + 4 > 12 a) {a | a > 2} b) {a | a > 4} c) {a | a > 8} d) {a | a > 10}