Answer:
27%
Step-by-step explanation:
Decrease= 15-11
=4
Percentage=4÷15
=0.266666667
=26.667%
~27%
The answer is B. -a+4+5a-a-6
you have to read the bottom link for the answer key
Answer:
6.25 gm left
Step-by-step explanation:
Find the number of half lives in 26.3 years
26.3 / 5.26 = 5 half lives
(1/2) ^5 = 1/32 nd of the original will be left
1/32 * 200g = 6.25 gm left