Plzz i will give brainlist answer the area of room a is (5x^2-7x-6)ft^2. room b has an area of 8x^2 +6x-1)ft^2. if room a is the larger room, how much greater is the area of room a than the area of room b. a. -3x^2-x-7 b. 13x^2-13x-7 c. -3x^2-13x-5 d. 3x^2-x-5

Option C. -3x^2-13x-5

Step-by-step explanation:

we know that

To find how much greater is the area of room A than the area of room B. subtract the area of room B from the area of room A

so

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )