Answer:
3.2%
Step-by-step explanation:
-Let r be the simple interest rate per annum.
-Given the total amount after 1 year is 1857.60, the initial amount is 1800
#We use the simple interest formula to find the rate of interest:
![Interest=Final\ Amount-Initial\ Amount\\\\=1857.60-1800\\\\=57.60\\\\I=Prt\\\\57.60=1800\times r\times 1\\\\r=\frac{57.60}{1800}\\\\=0.032\\\\=3.2\%](https://tex.z-dn.net/?f=Interest%3DFinal%5C%20Amount-Initial%5C%20Amount%5C%5C%5C%5C%3D1857.60-1800%5C%5C%5C%5C%3D57.60%5C%5C%5C%5CI%3DPrt%5C%5C%5C%5C57.60%3D1800%5Ctimes%20r%5Ctimes%201%5C%5C%5C%5Cr%3D%5Cfrac%7B57.60%7D%7B1800%7D%5C%5C%5C%5C%3D0.032%5C%5C%5C%5C%3D3.2%5C%25)
Hence, the annual interest rate on the deposit is 3.2%
The inequality built is: ![10s + 248 \geq 657](https://tex.z-dn.net/?f=10s%20%2B%20248%20%5Cgeq%20657)
Solving the inequality, it is found that Myesha needs to buy at least 41 sets.
--------------------
- The restaurant currently has 248 knives.
- Each set on sale contains 10 knives, thus, for s sets, 10s knives are added.
- If s sets are bought, the total number of knives is:
![T = 248 + 10s](https://tex.z-dn.net/?f=T%20%3D%20248%20%2B%2010s)
The restaurant needs at least 657 knives, thus:
![T \geq 657](https://tex.z-dn.net/?f=T%20%5Cgeq%20657)
The inequality is:
![10s + 248 \geq 657](https://tex.z-dn.net/?f=10s%20%2B%20248%20%5Cgeq%20657)
The solution is:
![10s \geq 409](https://tex.z-dn.net/?f=10s%20%5Cgeq%20409)
![s \geq \frac{409}{10}](https://tex.z-dn.net/?f=s%20%5Cgeq%20%5Cfrac%7B409%7D%7B10%7D)
![s \geq 40.9](https://tex.z-dn.net/?f=s%20%5Cgeq%2040.9)
Thus, Myesha needs to buy at least 41 sets.
A similar problem is given at brainly.com/question/17248342
Answer:
Step-by-step explanation:
84% of 150=126 (foreign coins)
150-126=24 (non foreign coins)