2)
1,700 gallons for 3 pumps
Divide 1,700 by 3 and we get what one pump does; 566 
We need 5,500 gallons, so we can divide by 566
for an answer of about 6.4782. You cannot have half of a pump, so our <u>answer is 7 pumps</u>.
3)

<em>Cross multiply:</em>
7 times x = 7x
500 times 100 = 50,000
50,000 = 7x
<em>Divide both sides by 7:</em>
<u>7,142 tons of gravel</u> = x
4)
Dozen = 12
12 divided by 3 <em>(number of eggs)</em> = 4
4<em> (batches you could make)</em> times 4 <em>(cookies made)</em> = 16
So you could make <u>16 dozen cookies with a dozen eggs</u>
I hope this helps, have a nice day :D
Hopefully you can read what the fractions say, they are formatted weird xD