A radioactive element decays so that after t years, the amount remaining, expressed in milligrams, of the original amount, is A(t) = 100(0.5)^t/3.8. Determine the rate of decay when 25% of the element is gone. Round to two decimal places.

repeat the question

step-by-step explanation:

hi! i think the answer is 1/2 : )

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation:

answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches