Grade 9 16. The speed of about in still water is 15 km lhr. It needs four more
hours to travel 63 km aginst the current of a river that It needs
to travel down the river. De termine the speed of the current of the river.​

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

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)

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.