If \(\log_a(y + 2) = 1 + \log_a x\), find x in terms of y. 2. The table shows the distribution of timber production in five communities in a certain year Co...

Assessment: WAEC SSCE - General Mathematics - 2018 (Essay) Subject: General Mathematics

Question 1 Report

If \(\log_a(y + 2) = 1 + \log_a x\), find x in terms of y.

2. The table shows the distribution of timber production in five communities in a certain year

Community Timber Production (tonnes)
Bibiani 600
Amenfi 900
Oda 1800
Wiawso 1500
Sankore 2400

1. Draw a pie chart to represent the information.

2. What percentage of timber produced that year was from Amenfi?

3. If a tonne of timber is sold at $560.00, how much more revenue would Oda community receive than Bibiani?

Answer Details

1. Given

\[\log_a(y+2)=1+\log_a x\]

Since \(1=\log_a a\),

\[\log_a(y+2)=\log_a a+\log_a x=\log_a(ax).\]

Therefore,

\[y+2=ax\]

\[\boxed{x=\frac{y+2}{a}}\]


2(a)(i) Pie chart

Total timber production:

\[600+900+1800+1500+2400=7200\text{ tonnes}.\]

CommunityProduction (tonnes)Sector angle
Bibiani600\(\frac{600}{7200}\times360^\circ=30^\circ\)
Amenfi900\(\frac{900}{7200}\times360^\circ=45^\circ\)
Oda1800\(\frac{1800}{7200}\times360^\circ=90^\circ\)
Wiawso1500\(\frac{1500}{7200}\times360^\circ=75^\circ\)
Sankore2400\(\frac{2400}{7200}\times360^\circ=120^\circ\)

graph
Pie chart showing timber production: Bibiani 30°, Amenfi 45°, Oda 90°, Wiawso 75°, and Sankore 120°.

2(a)(ii)

\[\frac{900}{7200}\times100\%=\boxed{12.5\%}.\]

2(a)(iii)

Difference in production:

\[1800-600=1200\text{ tonnes}.\]

Hence, the extra revenue received by Oda is

\[1200\times\$560.00=\boxed{\$672,000.00}.\]

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