Answer:
X product of powers
Quotient of powers
Power of a power
X power of a product
Negative exponent
X zero exponent
Hope this helps ʕ•ᴥ•ʔ
Answer:
The speed of the boat is 20 km/hr
Step-by-step explanation:
Let s be the speed of boat in still water
Let d be the distance
Upstream speed = s-4
Jane took 30 min to drive her boat upstream to water-ski at her favorite spot.
So, Distance traveled in upstream =![Speed \times time =(s-4) \times \frac{30}{60}](https://tex.z-dn.net/?f=Speed%20%5Ctimes%20time%20%3D%28s-4%29%20%5Ctimes%20%5Cfrac%7B30%7D%7B60%7D)
Downstream speed = s+4
So, Distance traveled in downstream = ![Speed \times time =(s+4) \times \frac{20}{60}](https://tex.z-dn.net/?f=Speed%20%5Ctimes%20time%20%3D%28s%2B4%29%20%5Ctimes%20%5Cfrac%7B20%7D%7B60%7D)
So, ![(s-4) \times \frac{30}{60}=(s+4) \times \frac{20}{60}](https://tex.z-dn.net/?f=%28s-4%29%20%5Ctimes%20%5Cfrac%7B30%7D%7B60%7D%3D%28s%2B4%29%20%5Ctimes%20%5Cfrac%7B20%7D%7B60%7D)
30s-120=20s+80
10s=200
s=20
Hence The speed of the boat is 20 km/hr