Situation:
find the substance's half-life, in days.
round your answer to the nearest tenth.
a 41 gram sample of a substance that's
used to detect explosives has a k-value
of 0.1392.
enter the correct answer.
n= noe-kt
done
no - initial mass (at time t = 0)
000
n = mass at timet
k = a positive constant that depends on
the substance itself and on the units
used to measure time
t = time, in days

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

x + 4/7

step-by-step explanation:

use cymath

a

step-by-step explanation:

u take $30 minus $24. the answer/original($30)

do you have a picture of the table