Nikki is updating her house with hardwood floors. She has a maximum of $8,400 to spend. The minimum amount she can spend if she buys the cheapest hardwood flooring is $7,200. She needs enough flooring to cover 1,200 square feet. The cost for labor and other materials is $3,600. The mequality representing this situation is 7200 < 1200x + 3600 and 1200x + 3600 < 8400. What is her price range per square foot for flooring pannels?​

Asquare parking lot has 6,400 square meters what is the length in meters

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?