This is a relatively easy half life calculation.
After one half-life period, half of the isotope remains.
After two half-life periods, one quarter of the isotope remains.
That being the case, we see this will take 2 half-life periods or 6 days.
Answer:
138 meters
Step-by-step explanation:
step 1
Find the radius of the circular city plaza
The area is equal to
we have
substitute
solve for r
step 2
we know that
To find out how long is the row of bricks, determine the circumference of the circular city plaza
The circumference is equal to
we have
substitute
Answer:
25m?
Step-by-step explanation:
I mean I'm not sure what the question is asking for but after 25 months he won't have any money left lol hope that helped ♡
X^2 = 81...take the square root of both sides, eliminating the ^2
x = (+-) sqrt 81
x = (+-) 9
answers are : -9 and 9
Answer:
A. (5040)(0.31)40(0.69)10
Step-by-step explanation:
Given. That :
P(resident who is 25 years or older) = 0.31
Sample size (n) = 50
Probability that B will be equal 40 ; r = 40
The probability that B = 40 can be obtained using the binomial probability formula :
P(x) = nCx * p^r * (1 - p)^(n - x)
Here, x = 40
P(40) = 50C40 * 0.31^40 * (1 - 0.31)^(50 - 40)
P(40) = 50C40 * 0.31^40 * 0.69^10
