Answer:
Let the tens digit of the required number be x and the units digit be y. Then,
x+y=12 .........(1)
Required Number = (10x+y).
Number obtained on reversing the digits = (10y+x).
Therefore,
(10y+x)−(10x+y)=18
9y−9x=18
y−x=2 ..........(2)
On adding (1) and (2), we get,
2y=14⟹y=7
Therefore,
x=5
Hence, the required number is 57.
Step-by-step explanation:
Hope it is helpful...
Answer:

Step-by-step explanation:
<u>Step 1: Make an expression</u>
45% of 156 is what number

<u>Step 2: Multiply</u>
<u />

Answer: 
Answer:
The population of the country will be 510 million during the year of 2018.
Step-by-step explanation:
The exponential model for the population, in millions, t years after 2003 is.

Use the model to determine when the population of the country will be 510 million.
t years after 2003, in which t is found when P(t) = 510. So



Applying ln to both sides, so we can find t



15.35 years after 2003, so during the year of 2018.
The population of the country will be 510 million during the year of 2018.
You are right with multiplying 100 and 3. An easier way to do it is to divide 300 and 4, so you can get the blank.