Solve the problem.Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is P = P0 e-0.0244t. How long will it take for 15 grams of strontium to decay to 5 grams? Round answer to 2 decimal places.
A. 40.50 years
B. 45.03 years.
C. 4.50 years
D. 450.25 years
Answer: B
Mathematics
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Use a calculator to approximate the root to the nearest thousandth.
A. 1.146 B. 1.127 C. 1.142 D. 1.114
Mathematics
Find the depreciation in the first partial year. Round to the nearest dollar.Cost: $2000Salvage: $200Life: 8000 hoursMethod: Units-of-productionAcquired: June 8Units produced: 1700 hours
A. $248 B. $391 C. $425 D. $228
Mathematics
Solve the problem.Find real numbers a, b, and c such that the graph of the function y = ax2 + bx + c contains the points 
, (2, 4), and (-3, 29).
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve.x - 3y + 3z = 4 y + 4z = 0 z = -4
A. (61 , 15, -4) B. (-61 , -15, -4) C. (64 , 16, -4) D. (-64 , -16, -4)
Mathematics