Answer:
1845 years
Step-by-step explanation:
Decay of Carbon-14 is usually modeled by an exponential function. It x is the number of years since the original amount was brought into existence, then the fraction remaining (y) is modeled by ...
... y = (1/2)^(x/5730)
We want to find the value of x when y = 80% = 0.80. The equation is then ...
... 0.80 = 0.50^(x/5730)
Taking logarithms, we get
... log(0.80) = (x/5730)·log(0.50)
Multiplying by the inverse of the coefficient of x, we have
... x = 5730·log(0.80)/log(0.50) ≈ 1845 . . . . years
Answer:
1. x=5
2. x=13
Step-by-step explanation:
1. 1x+2x+2=17
3x+2=17
17-2=15
3x=15
3 X 5 =15
2. -3+x=10
10+3=13
x=13
Answer: 235
Step-by-step explanation:
Total score if he average 205 = 205 * 4 = 820
Score needed on 4th game = 820 - 210 -185 - 190 = 235
Answer:
C=-33/8
Step-by-step explanation:
Hope I helped
Do u want a step by step explanation?
All real values of x except x = 2
Hope i did it right^^
