Which expression gives the distance between the points (5, 1) and (9, 6)?
A. (5-9+(1+632
B. 15 – 9) +(1+6)
C. 15-932 +(1-62
D. (5-9)2 + (1 - 672

; )

step-by-step explanation: ; )

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source: