Solve the second equation for 
, then substitute it into the first equation.
Not exactly
2/10 = .2
1/4 = .25
1/4 is 0.05 bigger than 2/10
To calculate what is asked we use the formula for radioactive decay. It is expressed as follows:
An = Ao (e^(-kt))
We calculate as follows:
An = Ao (e^(-kt))
74 = 100 (e^(-k(10)))
k = 0.0301
1/2 = (e^(-0.0301t))
t = 23 hours
Hope this answers the question.
Answer:
D) 6.48 x 10⁻³
Step-by-step explanation:
to get an exponent of -3 means you move the decimal point three spaces to the right
2) 8,300,000
3) 970,000
4) 5.01 x 10⁻² (picture) 5.01 x 10⁻¹ (question)
5) 0.000499
Answer:
A) The probability is 0.95 that the percent of adults living in the United States who are satisfied with their health care plans is between 63.6% and 68.4%.
Step-by-step explanation:
A polling agency reported that 66 percent of adults living in the United States were satisfied with their health care plans. The estimate was taken from a random sample of 1,542 adults living in the United States, and the 95 percent confidence interval for the population proportion was calculated as (0.636, 0.684).
This means that we are 95% sure that the true proportion of adults living in the United States who were satisfied with their health care plans is between 0.636 and 0.684.
So the correct answer is:
A) The probability is 0.95 that the percent of adults living in the United States who are satisfied with their health care plans is between 63.6% and 68.4%.
