<span>The amount of dissolved oxygen in the Missouri River would decrease if large amounts of chemical waste were dumped into it. It would decrease because the chemical waste would feed on the microorganisms and reduce the amount of oxygen in the river.</span>
For A:
You add the probabilities to get the answer to A: = .75, or 3/4
Note that the probability of ALL THREE of them hitting would be 1/3 x 1/4 x 1/5.
For B:
2/3 and 3/4 is the probability of the other two people MISSING (the remainder of 1/3, 1/4)
1.0 = 100% chance to hit the target, so 1.0 x 2/3 x 3/4 = 1/2
Mark's chance of hitting is 1/5, so do 1/2 x 1/5, = 1/10
Answer: 8 batches
explanation: 5 1/3 divided by 2/3 equals 8. To find out how many batches were made, you need to divide the total amount used by the amount needed for one batch.
Step 1: <span>Set up the long division.
_______
4| 3 2 2 0
Step 2: </span><span>Calculate 32 ÷ 4, which is 8.
</span> __ 8____
4| 3 2 2 0
3 2
Step 3: Bring down 20, so that 20 is large enough to be divided by 4.
__ 8____
4| 3 2 2 0
3 2
_________
2 0
Step 4: Calculate<span> 20 ÷ 4, which is 5.
8 0 5
</span> ________
4| 3 2 2 0
3 2
________
2 0
2 0
____
Step 5: Therefore,<span> 3,220 ÷ 4 = 805.
The answer is 805
Done! :)</span>
