Amanishah bought 3,898 pens to sell at his shop. Each pen has a mass of 0.012 kg and sold each pen for GHC 0.85. Find, correct to 2 decimal places: a) The total mass of all the pens b) The total amount he will get when he sells half of the pens.

a) The total mass of all the pens:

Step 1: Identify the given values. Number of pens = $3,898$ Mass of one pen = $0.012$ kg

Step 2: Calculate the total mass by multiplying the number of pens by the mass of one pen. $Total mass = 3,898 \times 0.012 kg$ $Total mass = 46.776 kg$

Step 3: Round the total mass to 2 decimal places. $Total mass = 46.78 kg$ The total mass of all the pens is $\boxed{*46.78 kg*}$.

b) The total amount he will get when he sells half of the pens:

Step 1: Determine the number of pens sold (half of the total pens). $Number of pens sold = \frac{3,898}{2}$ $Number of pens sold = 1,949$

Step 2: Identify the selling price per pen. Selling price per pen = GH¢ $0.85$

Step 3: Calculate the total amount by multiplying the number of pens sold by the selling price per pen. $Total amount = 1,949 \times 0.85 GH¢$ $Total amount = 1656.65 GH¢$

Step 4: The amount is already in 2 decimal places. The total amount he will get is $\boxed{*GH¢ 1656.65*}$.

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