Solve the problem.A sample of 550 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 20 years? Round to the nearest whole gram.
A. 1 g
B. 964 g
C. 215 g
D. 0 g
Answer: C
Mathematics
You might also like to view...
Solve.A loaded moving truck is traveling 20 mph faster than a freight train. In the time it takes the train to travel 90 miles, the truck travels 130 miles. Find the speed of the truck.
A. 65 mph B. 20 mph C. 13 mph D. 130 mph
Mathematics
Write the decimal as a fraction in simplified form.0.944
A. 
B. 
C. 
D. 
Mathematics
Find the standard form of the equation of a circle that satisfies the given conditions.Center (6, -3); passing through the point (9, 1)
A. (x + 3)2 + (y - 6)2 = 9 B. (x - 3)2 + (y + 6)2 = 9 C. (x - 6)2 + (y + 3)2 = 25 D. (x + 6)2 + (y - 3)2 = 25
Mathematics
Solve the equation.
= 
A. x = 
B. x = - 
C. x = - 
D. x = 
Mathematics