Answer:
ok
Step-by-step explanation:
Answer : 15 seconds
25% is equal to 1/4, so you can just divide 60 seconds by 4, and that gives you the answer.
Answer: A=900
The awnser is 900
Step-by-step explanation:
15 x 4 = 60 60 x 15 equals 900
1g = 1,000mg
0.5g = 0.5 · 1,000mg = 500mg