Solve the problem.The decay of 514 mg of an isotope is given by A(t) = 514e-0.021t, where t is time in years. Find the amount left after 63 years.
A. 137 mg
B. 503 mg
C. 134 mg
D. 69 mg
Answer: A
You might also like to view...
Solve the problem.A 100 gal tank is half full of distilled water. At time = 0, a solution containing 2 lb/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 
When the tank is full, how many pounds of concentrate will it contain?
A. 187.5 pounds B. 175 pounds C. 150 pounds D. 200 pounds
Solve the problem.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by y = 
. What is the cost per ton for x = 300?
A. $214.29 B. $150.00 C. $64,285.71 D. $150,000.00
Let (m × n) denote a matrix of size m × n. Find the size of the following product, or state that the product is not defined.(1 × 1)(2 × 1)
A. 2 × 1 B. not defined C. 1 × 2 D. 2 × 2
Multiply.(4 + x)(5x - 12)
A. 5x2 - 48x + 8 B. 5x2 + 8x - 48 C. 5x2 + 7x - 48 D. x2 + 8x + 8