The half life is 138 days, meaning exactly half of the material will decay after this time. Use this information to find the decay factor 
:
Then after 250 days, there will be
grams left.
Answer:
3.9 mi/h
Step-by-step explanation:
We assume that the given speeds are the speeds of the boats relative to the water. If c is the speed of the current, we have ...
time = distance/speed
47/(15 +c) = 40/(20 -c)
47(20 -c) = 40(15 +c) . . . . . . multiply by (20-c)(15+c)
940 -600 = 40c +47c . . . . . add 47c-600
340 = 87c . . . . . . . . . . . . . . . simplify; next divide by 87
c = 340/87 ≈ 3.9080 . . . . mi/h
The speed of the current is about 3.9 mi/h.
Answer:
1/6 a gallon of paint is in each container
Step-by-step explanation:
2/3 * 1/4 = 2/12
2/12 = 1/6
Answer:
I think B
Step-by-step explanation:
Answer:
f ( x ) = - 101
Step-by-step explanation:
Step 1:
f ( x ) = - x² - 20 Function
Step 2:
f ( x ) = - 9² - 20 Substitute x
Step 3:
f ( x ) = - 81 - 20 Exponents
Answer:
f ( x ) = - 101 Subtract
Hope This Helps :)
