Answer:
3
Step-by-step explanation:
Let's use the distance formula:
So it is:
AB :
BC:
CA:
So 9.43 + 5 + 8 =22.43
<span>Let us assume that the rate of decay follows a 1st
order reaction. Therefore the formula for rate of decay is:</span>
<span>A = Ao e^-kt --->
1</span>
Where,
A = final value after time t
Ao = initial value at t zero
k = rate constant
t = time elapsed
First let use find for the value of constant k. We know
that the formula for half-life is:
t-half life = ln 2 / k
Finding for k:
5730 = ln 2 / k
k = 1.21 * 10^-4 yr^-1
Since it is stated that A = 0.00061 Ao, therefore
substituting all the values into equation 1:
0.00061 Ao / Ao = e^(-1.21 * 10^-4 yr^-1 * t)
Finding for t:
t = 61,173.98 years
<span>The person died about 61,174 years ago.</span>
C because 40•27/2•4+27•27 is 2,889 40 is height 27 is base area of triangle u divide by 2 then there is 4 sides so u multiply by 4 and u need to add the base which is base times height and base is 27 and height is 27 so when u do all that u get C
12x2+6=30 and 30x20=600 so 600-%75= which is 150 so the answer is A. $150. hope this helps >^_^<
