Answer:
240 students
Step-by-step explanation:
Grade 7 : Grade 8 = 5 : 3
Number of seventh grade students = 5x
Number of Eighth grade students = 3x
3x = 90
x = 90÷3
x = 30
Total students = 5x + 3x = 8x = 8 * 30 = 240
<span>Well, think of it this way? How many times does 5 go into 9?
5 * 1 = 5
5 * 2 = 10
So 5 goes into 9 one time. Then you have to subtract that 5 from 9 to be left with your fraction value.
1 and 4/5 is your mixed number.</span>
Answer:
its D
Step-by-step explanation:
Answer:
1.25kg
Step-by-step explanation:
useing the problem the half life equation will be:
f(x)=5(0.5)^(x/140)
x is amount of days
so plugging in 280 for x will get 1.25kg
