65 years old justin
Step-by-step explanation:
63:65
They hiked about 4.7 times as far or it could also be 4 7/10 times as far
Answer: d) -5, -40, -640
<u>Step-by-step explanation:</u>
![A_n=-5\cdot 2^{x-1}\\\\A_1=-5\cdot 2^{1-1}\\\\.\quad=-5\cdot 2^0\\\\.\quad=-5\cdot 1\\\\.\quad=-5\\\\\\\\A_4=-5\cdot 2^{4-1}\\\\.\quad=-5\cdot 2^3\\\\.\quad=-5\cdot 8\\\\.\quad=-40\\\\\\\\A_8=-5\cdot 2^{8-1}\\\\.\quad=-5\cdot 2^7\\\\.\quad=-5\cdot 128\\\\.\quad=-640](https://tex.z-dn.net/?f=A_n%3D-5%5Ccdot%202%5E%7Bx-1%7D%5C%5C%5C%5CA_1%3D-5%5Ccdot%202%5E%7B1-1%7D%5C%5C%5C%5C.%5Cquad%3D-5%5Ccdot%202%5E0%5C%5C%5C%5C.%5Cquad%3D-5%5Ccdot%201%5C%5C%5C%5C.%5Cquad%3D-5%5C%5C%5C%5C%5C%5C%5C%5CA_4%3D-5%5Ccdot%202%5E%7B4-1%7D%5C%5C%5C%5C.%5Cquad%3D-5%5Ccdot%202%5E3%5C%5C%5C%5C.%5Cquad%3D-5%5Ccdot%208%5C%5C%5C%5C.%5Cquad%3D-40%5C%5C%5C%5C%5C%5C%5C%5CA_8%3D-5%5Ccdot%202%5E%7B8-1%7D%5C%5C%5C%5C.%5Cquad%3D-5%5Ccdot%202%5E7%5C%5C%5C%5C.%5Cquad%3D-5%5Ccdot%20128%5C%5C%5C%5C.%5Cquad%3D-640)
75% of the teachers were first-year teachers
Step-by-step explanation:
the formula for percentage will be used for the problem
The percentage is given by:
![Percentage=\frac{Quantity}{Total}*100\\](https://tex.z-dn.net/?f=Percentage%3D%5Cfrac%7BQuantity%7D%7BTotal%7D%2A100%5C%5C)
Here
Total teachers = 57+19 = 76
First-year teachers = 57
So,
![Percentage\ of\ first\ year\ teacher = \frac{57}{76}*100\\=0.75*100\\=75\%](https://tex.z-dn.net/?f=Percentage%5C%20of%5C%20first%5C%20year%5C%20teacher%20%3D%20%5Cfrac%7B57%7D%7B76%7D%2A100%5C%5C%3D0.75%2A100%5C%5C%3D75%5C%25)
Hence, 75% of the teachers were first-year teachers
Keywords: Percentage, Percent
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