Annie bought 3/4 kg of cocoa powder, which cost $12.92 per kg.* Estimate the cost.b. Find the exact amount she had to pay​

Answer:Estimated cost; $9Exact amount; $9.69Step-by-step explanation:We are told that ​Annie bought 3/4 kg of cocoa powder, which cost $12.92 per kg.a.We are required to estimate the cost of the 3/4 kg of cocoa powder given that 1 kg costs 12.92We can round down the cost of a kg to obtain $12 per kg. Therefore, 3/4 of a kg will cost approximately;(3/4) of 12= (3/4)*12 = $9Thus the estimated cost is $9b.We are required to determine the the exact amount she had to pay for the 3/4 kg of cocoa powder;1 kg cost 12.923/4 of a kg will cost;(3/4) of 12.92= (3/4) * 12.92Using a calculator we have;9.69Therefore, the exact amount paid was $9.69