Answer:
Step-by-step explanation:
Given
Required
Determine the total size of the string
To do this, we multiply the number of pieces by the length of each piece.
Convert to mixed number
Answer:
5 sheets.
Step-by-step explanation:
There are 28 / 4 = 7 students in one group.
Each group was given 35 sheets of paper so each student got 35/7
= 5 sheets.
For this case we have an equation of the form:
y = A (b) ^ t
Where,
A: initial amount
b: decrease rate
t: time
Substituting values:
y = 750 (0.5) ^ ((1/15) * t)
The number of days to reach 68 mg is:
68 = 750 (0.5) ^ ((1/15) * t)
Clearing t:
(0.5) ^ ((1/15) * t) = (68/750)
log0.5 ((0.5) ^ ((1/15) * t)) = log0.5 (68/750)
(1/15) * t = log0.5 (68/750)
t = 15 * log0.5 (68/750)
t = 51.94
Rounding:
t = 52 days
Answer:
D. ≈ 52 days
