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Radioactive strontium 90Sr has been deposited in a large field by acid rain. If sufficient amounts make their way through the food chain to humans, bone cancer can result. It has been determined that the radioactivity level in the field is 1.7 times the safe level S. 90Sr decays according to the following formula, where A0 is the amount currently in the field and t is the time in years.
A=A0e^-0.0233t
For how many years will the field be contaminated? (Round your answer to the nearest tenth.)
State whether each of the following fraction is a terminating or repeating decimal. If the decimal terminates, state the number of decimal places and show how you decided.
Let R be the shaded region bounded by the graphs of y=sqaure root of x, and y=e to the power of -3x, and the vertical line x=1.
Three workers sort 66 boxes in a day. One of the workers is three times more productive than the second worker and twice as productive as the third worker. How many boxes did the second most productive worker sort?
Find the x-intercept of L(x) as a way of estimating the x-intercept of f(x). Round the coefficients 3 decimal places.
Find the volume of the solid bounded by the cylinder y^2 + z^2 = 4 and the planes x = 2y, x = 0, z = 0 in the first octant. Calculate the double integral by using two iterated integrals with different orders of x and y integration. Do not use pola..
Please provide a detailed, step by step solution for the following problem using a triple integral if possible. Find the volume inside the paraboloid Z = X^2 + Y^2 below the plane Z = 4
A wrench 0.2 meters long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 newton-meters of torque to ..
How fast is the object moving 9s after being thrown?
Let m'(A) = inf sum of |M_i| where i is from 1 to infinity, such that A is a subset of M_i. M_i's are disjoint.
In Algebra, when using the addition method, how can you tell if a system of linear equations has infinitely many solutions?
Use the recurrence equation above and strong induction to prove that F(n) =1, where F(n) is the Fibonacci sequence.
Let S = {1,2,3,4,5,6,7,8}. Determine: The number of subsets of S. The number of subsets of S with at most four elements
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