B) $1,400 at 2%; $2,200 at 4%
C) $1,000 at 2%; $1,800 at 4%
Answer: Option 'C' is correct.
Step-by-step explanation:
Since we have given that
Let the principal amount be 'x'.
First rate of interest = 2%
Second rate of interest = 4%
Number of years = 1
Amount of interest he earned = $92
According to question,
So, First investment of $1000 at 2% and Second investment of $1000+$800=$1800 at 4%.
Hence, Option 'C' is correct.
7 units
5 units
7√ units
Answer:
5
Step-by-step explanation:
Answer:
x=-4
Step-by-step explanation:
Since we know that the equation will be x= we will just have to take the x value of the coordinate point and that would be the x so in this case the x is -4 so the equation would be x=-4
Answer:
20 units
Step-by-step explanation:
Initial particle concentration = 80 units
Particles removed each hour = 50% of the remaining particles
To find:
Particle concentration after 2 hours = ?
Solution:
Particles removed in 1 hour = 50% of remaining particles
i.e. Particles removed in 1 hour = 50% of initial concentration
Particles removed in 1 hour = 50% of 80 = 40
Particles removed in next 1 hour = 50% of remaining particles
i.e. Particles removed in next 1 hour = 50% of concentration after 1 hour
Particles removed in next 1 hour = 50% of 40 = 20
Total particles concentration removed in 2 hours = 40 + 20 = 60 units
Therefore, particle concentration after 2 hours = Initial concentration - Total particle concentration removed in 2 hours
= 80 - 60 = 20 units