63.3% decrease
49 - 18 = 31
31/49 = 0.63265 x 100
= 63.3 rounded to the nearest tenth of a percent
To show the negative of a square root, a negative sign would have to be placed outside the radical.
Answer:
Sorry about the incorrect answer
9. 120km
The time is two hours, and the rate is 60 km/hour or 60km in one hour. 60×2 = 120
10. 9 minutes
The rate is 80m/min, and the distance is 720 m.
720÷80 = 9 min
