When the sum of 1.9 and 2.2 is subtracted from the product of 1.9 and 2.2, what is the difference?
! : )

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)

Sweet t saved 20 percent of the total cost of the green-eyed fleas new album let there be fleas on earth. if the regular price is $30 how much did sweet save

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?