25in =1000ft since it looks nicer (I found this by multiplying each side by 1000)9. The ratio for this is 3:2:1. In total there are 6 total paint ratios (3+2+1). First divide 18 by 6, which is 3. So for each 1,......
5.Same thing as before. 1/100 = x/85. this time 100x = 85 and x = .85 lbs for the weight of the brain
6. proportions again. x/540km =2cm/50km. 50x=1080 x then is 21.6 cm so that's the distance on the map
7. 6.5oz/1.59 = 25oz/x. 6.5x =39.75 x ends up being a number with a lot of decimals, so just round it. the grand total for 25 oz of tuna is $6.12
8. In this case just divide 18/8000 which equals .00225in = 1ft but I would probably go with 2.25in =1000ft since it looks nicer (I found this by multiplying each side by 1000)
9. The ratio for this is 3:2:1. In total there are 6 total paint ratios (3+2+1). First divide 18 by 6, which is 3. So for each 1, there are 3 gallons of paint. Multiply 3(the number of blue for each 1) by 3 to figure out the total of blue. So 9 gallons.
Just make sure write down the units. Cancel them out and you will always be ok.
1. 2in / 3ft * 65ft = 43.3in
2. 3in / 1/4 in * 1/2in = 6 in
3. 2.25 in / 56.25 mi = .04 in : 1 mi
You can do the rest.
These are real easy. I'm too lazy to do them, but I can tell you how. Let's do #4 together, as that one seems simple. Four ounces of perfume are 20.96 dollars. In your brain, imagine 20.96/4 as a fraction. Now I want you to imagine 20.96/4 = x/6. Keep in mind that "x" represents your answer. 4*1.5 is 6. Well, now you have your answer! If you must multiply 4 by 1.5 to get one half of the equation, multiply 20.96 by 1.5 to get x! 20.96*1.5 = 31.44. 31.44 dollars is your answer.
