In 1 mm3 of blood, there are white blood cells. How many white blood cells would be in a standard blood donation of 4,500 mm3? Write your answer in scientific notation.
The table provided shows a set of data about the effectiveness of different forms of birth control in the US in 2019. Which of the following statements about this data is correct?
|Effectiveness at Preventing Pregnancies ()||99||91||85||78||88|
The total biomass of the producers in a food chain is 2,500 kg. of this biomass is passed on to the primary consumers. Calculate the biomass, in kilograms, that is passed on to the primary consumers. Give your answer to the nearest whole number.