The bedroom in a house is 1,200 cubic meters. We know that there are 3.4 x 10^9 particles of dust per cubic meter. How many particles of dust are present in the bedroom? Write your answer in scientific notation.

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%

Find the solution of this system of equations -7x+y=-20 9x-3y=36

Abcd is a square what is the length of line segment dc