Mark worked 60 hours last week. He spent 35% of his time working on the Rivers project, 45% working on the Brown project, and 20% working on the Richards project. How many hours did he work on the Brown project?

Divide and round to the nearest hundredths place. 0.82 : 9

Solve the equation 3 (-a-3) - 2 (3a+3) = -78

Find the percent of the change from 145 to 85

If A and B are 6x5 matrices, and C is a 8 x 6 matrix, which of the following are defined? A. CT B. AC C. B+C D. A+B E. ABT F. CA

How do you calculate the area of a triangle using trigonometry?

What's the result of: (2/3) ³

Airline fares for a flight from Dallas to Austin are $30 for first class and $25 for the tourist class. If a fight had 52 passengers who paid a total of $1360, how many first class passengers were on the trip?

You have a recipe that requires 1/3 cup of sugar, but you only want to make a fourth of the recipe. How much sugar do you need to make this fraction of the recipe?

I just need clarification. If a rectangular prism has the dimensions of 10 by 4 by 6, The volume would be 240 in³ and the surface area would be 248 in² right?

A Web music store offers two versions of a popular song. The size of the standard version is 2.2 megabytes (MB). The size of the high-quality version is 4.5 MB. Yesterday, there were 720 downloads of the song, for a total download size of 2688 MB.