Answer:
The correct option is 1/4^2
Step-by-step explanation:
The given expression is:
4^6 * 4^-8
According to the same base rule if the exponents have the same base then the exponents will be added.
If we look at the given expression both the values have the same base.
Therefore we will add the exponents of the value.
= 4^6+(-8)
= 4^6-8
= 4^-2
Now to change the negative exponent into positive we will take it to the denominator.
4^-2 = 1/4^2
Thus the correct option is A....
Answer:
Step-by-step explanation:
The top has area (3 cm)(5 cm), or: 15 cm^2
The bottom has the same area: 15 cm^2
Each of the ends has the area (3 cm)(2.5 cm): 7.5 cm^2
7.5 cm^2
Each of the sides has the area (2.5 cm)(5 cm) 12.5 cm^2
12.5 cm^2
-------------------
70 cm^2
The total lateral area is 70 cm^2
Given:
A train travels 288 km at a uniform speed.
If the speed has been 4 km per hour more it would have taken one hour less for the same journey.
To find:
The initial speed of the train.
Solution:
Let x km/h be the initial speed on the train.
New speed of train = (x+4) km/h
We know that,
Time taken by the train initially to cover 288 km is hours.
New time taken by the train to cover 288 km is hours.
It is given that If the speed has been 4 km per hour more it would have taken one hour less for the same journey.
Splitting the middle term, we get
We know that the speed cannot be negative. So, the only possible value of x is 32.
Therefore, the speed of the train is 32 km/h.
Answer:
wowo
Step-by-step explanation: