Write the number 0.0000009 in scientific notation

A population of rabbits, in the absence of other factors, grows at a rate proportional to the current population: specifically, it triples every 2 years. There is another factor, however: foxes kill 2 rabbits per month.

Chris took his daughters to watch a new Disney movie. At the movies they were each able to get a drink and a small popcorn. the drinks cost $3.25 and the small popcorn costs $4.50. How much did Chris spend on snacks for his two daughters?

9 51/58 simplest form

A square window in Rosa's room has sides that are 22 inches long. Rosa wants to buy a new window frame that costs $2.00 per inch. How much will the window frame for Rosa's window cost?

Divide £10 into the ratio 2:3

Best Buy sells CDS and DVDS. Jose bought 3 CDs and 2 DVDs for $58. Lisbeth bought 1 CD and 4 DVDs for $46. Determine the selling price for each

There is a 40% chance that you will be elected president of the history club. There is a 10% chance that your friend will be elected treasurer of the history club. You use a random number generator to randomly generate 50 numbers from 0 to 99.

Car A travels 105 miles on 3 gallons of petrol. Car B travels 80 miles on 9 litres of petrol. which car has the better petrol consumption (ie more miles per gallon) ? you may use the fact that 1 gallon=4.5 litres.

Nacy is saving 2 bucks from her allowance every week marco is saving 1 the frist week 2 teh second week 3 teh third week and so on at the end of ten weeks who got more money?

What two numbers multiply to get - 27 and add to 6