Please help, Jack is shopping. Last week he bought $10 of groceries and ended up paying $10.07 after taxes.

This week he's buying $15 of groceries. If the tax rate remains the same, how much will he end up paying after taxes?

(Be sure your answer includes the $ sign and two decimal places! so for example, if you think the answer is "five dollars" you need to type $5.00 )

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms