The distance from Point A to Point B is 5x2 + 3 miles. The distance from Point B
to Point C is 10 2x2 miles. The distance
from Point C to Point D is 4 miles. If Mike
walks from Point A to Point B, then to Point
C, and finally to Point D, which expression
represents the total distance he travels
in miles?
A
3x2 - 3
с
7x² + 7
B
3x2 + 17
D
-10x4 + 120

23

Step-by-step explanation:

5 x 2 is 10 + 3 is 13

2 x 2 is 4, 10 - 4 is 6

13 + 6 = 19

19 + 4 is 23

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)