Answer:
5.6 days
Step-by-step explanation:
We are given;
Initial Mass; N_o = 25 g
Mass at time(t); N_t = 25/2 = 12.5 (I divide by 2 because we are dealing with half life)
k = 0.1229
Formula is given as;
N_t = N_o•e^(-kt)
Plugging in the relevant values;
12.5 = 25 × e^(-0.1229t)
e^(-0.1229t) = 12.5/25
e^(-0.1229t) = 0.5
(-0.1229t) = In 0.5
-0.1229t = -0.6931
t = -0.6931/-0.1229
t = 5.6 days
Answer:
x = 3.5
Step-by-step explanation:
15(1/2) = 7.5
7.5+6 =13.5
subtract 17 and divide by -1 to isolate x 13.5-17/-1
x = 3.5
C is a non terminating decimal.
a = 0.75
b = 0.8
c = 0.333333 (and will never terminate)
The answer is 40
Way to solve 1:
You notice that the rectangle is split into half. Find the area of the rectangle first
10x8=80
Since that is half the rectangle, you then divide it by half.
80/2=40
Way to solve 2:
You can also see it as a triangle. The length is 10 and the height is 8. The formula for solving area for triangles is below
A=hw/2
(H is height and w is width.)
Because of order of operations, we do height times width first. In this case, that is 8x10
8x10=80
Then, you have to divide that by 2.
80/2=40
