Answer:
There will be 22.5 grams left after 32 hours.
Step-by-step explanation:
A half-life is how long it takes for half of the amount to go away. In this case, we see that we have two half-life periods worth, which you can determine by dividing the total time by the half-life time.
32hrs/8hrs = 4 half lives.
Now we can raise 1/2 to the power of how many half lives we have (2). Then we multiply that by the amount in the sample.
(1/2)^4 * 360
1/16 * 360
22.5 grams
And this is an exponential function.
A. $90
150 x .40= 60
150-60=90
X^2 -61 =20
X^2= 81x =9 x=-9
Answer:
B
Step-by-step explanation:
angles on the circumference of a circle subtended on the same arc are congruent , then
x = 52°
