Answer:
m=17
Step-by-step explanation:
$15 minus $0.14(# minutes) = $12.62
15 - .14m = 12.62
.14m = 15 - 12.62
.14m = 2.38
m = 2.38/.14
m = 17 minutes
Answer: 3m
You're multiply 3 by m. Since this isn't possible unless you have m's value, you must write the expression as 3m.
1 ug = 0,001 mg
0,0002 ug= x
x= (0,0002×0,001)/1
x= 2e-7
so the right answer is of option D
Have a great day and hope this helps!!!