What is the correct word representation for (1×1/10) + (2×1/100) + (3×1/1000)

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries