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How can you solve this question with these formulas  A=P(1+r/n)nt N=N0(1/2) t/h

The tax on Jerry's lunch bill was 8.4%. He paid 20% tip on the combined cost of the meal and tax. If he paid a total of \$18.15 for lunch, what was the cost of his meal before tax and tip?

When interest is compounded continuously, the balance in an account after t years is given by P(t) = P0ekt, where P0 is the initial investment and k is the interest rate. Suppose that P0...

In a group of 14 children some are nine years old and the rest are eleven years old. When the ages of the 14 children are added together the total is 138 years. How many nine-year-old children are...

The product of the room numbers for two adjoining rooms on that side is 7920. Find the room numbers.

A country's population doubled in 45 years. What is the exponential growth rate?Growth

Suppose \$1000 is invested at interest rate k, compounded continuously, and grows to \$1144.54 in 3 years.   1) What is the interest rate? 2) What is the exponential growth formula...

a gas station has 30 gallon of gasoline worth 1.20 per gallon and some worth 1.40 per gallon .how many gallons of the 1.40 brand must the owner mix in to produce gasoline that cost 1.28 per gallo...

i got a homewrok to do i have no idea how to do it so can somebody help me with them

Jim invested in ford motors.  He gained 10 % of his investment, giving him \$50.  What was his initial investment? show work

3 green notes and 8 blue notes are worth 46. 8 green notes and 3 blue notes are worth 1. How much are 2 green notes and 3 blue notes worth?

I am trying to pull out equations from word problems

see here for end of question: nonskid material, how wide can the strip of the nonskid surface be?

a. A flat fee of \$50 per month for unlimited calls (is it 50=x)   b. a \$30 per month fee for a total of 30 hours of calls and an additional charge of \$0.01 per minute for all calls over...

The length of the incline is 4 in. less than three times its height. How high is the ramp?

finnd three consecutive off positive integers such that two times the sum off all three integers is sixty five less than the product of the first and second integers

turned up to make a box with a volume 273 in^3. find the length and width of the original piece of sheet metal.

108-10x-y   108-x-y   208-10x+y   208-x-y

need to know what is left in the bag after some poured into canister which gives the canister 2 times the mass over the bag

Have to solve the problem.