The answer is the last one option: y+6=-34(x+2). I told you the reason in the other similar question.
Answer:
student a answered correctly
Step-by-step explanation:
student b didn't multiply the crossproducts
Answer:
the answer is 6
Step-by-step explanation:
To model half-life, use the formula

. Here,

is the amount remaining after a length of time

.

is the amount that you start with.

is the half-life. You plug in 50 for

, 10 for

, and 25 for

. You get

.
0.4 is four tenths. 0.4 = 4/10=2/5