Step-by-step explanation:
Principle(p) =Rs. 1500
Rate(R) =2.5 %
Time(T) =5 yrs
Now,
SI=P×T×R/100
=1500 ×5 ×2.5 /100
=RS.187.5
The money would be multiplied by a factor of 16 after 28 years
<h3>How to determine the factor?</h3>
The rate is given as:
Rate = Double every 7 years
There are 4 7 years in 28 years.
So, the factor would be:
Factor = Rate^4
This gives
Factor = 2^4
Evaluate
Factor = 16
Hence, the money would be multiplied by a factor of 16 after 28 years
Read more about exponential factors at
brainly.com/question/11464095
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Answer: yes because you wouldn’t be able to multiply them and they wouldn’t bothe be fractions.
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
3(x+2)=12
Distribute:
3x+6=12
Subtract:
3x+6-6=12-6
3x=6
Divide:
x=2
18 kg of 15% copper and 72 kg of 60% copper should be combined by the metalworker to create 90 kg of 51% copper alloy.
<u>Step-by-step explanation:</u>
Let x = kg of 15% copper alloy
Let y = kg of 60% copper alloy
Since we need to create 90 kg of alloy we know:
x + y = 90
51% of 90 kg = 45.9 kg of copper
So we're interested in creating 45.9 kg of copper
We need some amount of 15% copper and some amount of 60% copper to create 45.9 kg of copper:
0.15x + 0.60y = 45.9
but
x + y = 90
x= 90 - y
substituting that value in for x
0.15(90 - y) + 0.60y = 45.9
13.5 - 0.15y + 0.60y = 45.9
0.45y = 32.4
y = 72
Substituting this y value to solve for x gives:
x + y = 90
x= 90-72
x=18
Therefore, in order to create 90kg of 51% alloy, we'd need 18 kg of 15% copper and 72 kg of 60% copper.
