Can you please direct me in the right way to finding the answer to these problem. I have been out of school since 1995 and have no idea how to sit them up.

If your friend drank 700mL of your liter of soda, what percent of soda did she leave for you? If the liter costs 1.50 what does she owe you? Assume that one mL of soda weighs the same as one mL of pure water, even though that's not exactly the case.
My Partial Answer
I know that one liter equals 1000mL. so 700mL/1000mL=.07 im not sure but i put 30% was left for me. that's as far as i can get on this problem. thanks

You have a good start.

700mL/1000mL = 0.7
To convert 0.7 to a percent, either
multiply by 100
or move the decimal point two places to the right.

0.7 = 70%

You're right -- she left you 30%.

To find what she owes you -- multiply 0.7 * $1.50

Sure, I can help guide you through solving this problem step by step.

To find the percentage of soda that your friend left for you, you need to divide the amount she drank (700 mL) by the total amount of soda (1 liter = 1000 mL) and then multiply by 100 to obtain the percentage.

Here's how you can calculate it:
1. Divide 700 mL by 1000 mL: 700/1000 = 0.7
2. Multiply the result by 100 to convert it into a percentage: 0.7 * 100 = 70

Therefore, your friend left you with 70% of the soda, not 30% as you initially thought.

Now, to determine how much your friend owes you, you need to calculate the cost of the soda she drank. Since one liter of soda costs $1.50, you need to find the cost per milliliter and then multiply it by the amount she consumed.

Here's how you can do that:
1. Divide the total cost by the total amount of soda: $1.50 / 1000 mL = $0.0015 per mL
2. Multiply the cost per mL by the amount your friend drank: $0.0015/mL * 700 mL = $1.05

Therefore, your friend owes you $1.05 for drinking 700 mL of your soda.

I hope this helps! Let me know if you have any further questions.