You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

A worker at a medical lab is studying blood samples. 2 samplescontained a total of 7341 blood cells. The first sample contained 4221blood cells. How many blood cells were in the second sample?
3120.0

At the beach, Miki and her sister both built sandcastles and then measured their heights. Miki's sandcastle was 0.83 foot tall and her sister's was 0.53 foot tall. How much taller was Miki's sandcastle than her sister's?
0.3

A worker at a medical lab is studying blood samples. 2 samplescontained a total of 7341 blood cells. The first sample contained 4221blood cells. How many blood cells were in the second sample?

3120.0