Answer:
0.625 is a decimal and 62.5/100 or 62.5% is the percentage for 10/16.
Step-by-step explanation:
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Answer:
1
Step-by-step explanation:
Answer:
Part 1 : 
Part 2 : Half life is 84 minutes ( approx )
Step-by-step explanation:
Part 1 : Suppose the function that shows the amount( in grams ) of the substance after t minutes,

If t = 0 min, A = 250 grams,


If t = 250, A = 32 grams,



Taking ln both sides,


Hence, the equation that shows this situation,

Part 2 : If A = 250/2 = 125,


Taking ln both sides,


Therefore, the half life of the substance would be 84 minutes.
Thanks. I’m not struggling or anything but thanks for the kind words.
(x - 1)(x - 2)(x + 2)
note that the sum of the coefficients 1 - 1 - 4 + 4 = 0
thus x = 1 is a root and (x - 1 ) is a factor
dividing x³ - x² - 4x + 4 by (x - 1)
x³ - x² - 4x + 4 = (x - 1)(x² - 4 ) (note (x² - 4 ) is a difference of squares )
x³ - x² - 4x + 4 = (x - 1)(x - 2)(x + 2)
(x - 1)(x - 2)(x + 2 ) =0
x - 1 = 0 ⇒ x = 1
x - 2 = 0 ⇒ x = 2
x + 2 = 0 ⇒ x = - 2
solutions are x = 1 or x = ± 2