Environment
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Q. A botanical garden has 400 species of plants, and 10% of them are rare. How many rare species are there?
Q. A car consumes 8 liters of fuel for every 100 km. How much fuel will it consume for a trip of 250 km?
Q. A car emits 150 grams of CO2 per kilometer. How much CO2 does it emit after traveling 250 kilometers?
Q. A car emits 150 grams of CO2 per kilometer. How much CO2 will it emit after traveling 250 kilometers?
Q. A certain ecosystem has a carrying capacity of 1000 individuals. If the current population is 750, what percentage of the carrying capacity is currently being utilized?
Q. A certain ecosystem has a carrying capacity of 1000 individuals. If the current population is 800, what percentage of the carrying capacity is currently being utilized?
Q. A certain ecosystem has a carrying capacity of 300 animals. If the current population is 240, what percentage of the carrying capacity is currently utilized?
Q. A certain plant species can grow in 5 different types of soil. If a researcher tests 3 types of soil, what is the probability that the plant will grow in the tested soil?
Q. A certain species of fish can reproduce every 6 months. If a single fish reproduces 20 offspring each time, how many fish will there be after 3 years assuming no deaths?
Q. A certain species of fish can reproduce every 6 months. If a single fish reproduces 20 offspring each time, how many fish will there be after 3 years assuming all offspring survive?
Q. A city has a population of 1 million people. If each person generates 0.5 kg of waste per day, how much waste is generated in a week?
Q. A city has a population of 1 million people. If each person generates 1.5 kg of waste per day, how much waste is generated in a week?
Q. A city has a population of 1 million people. If each person produces 1.5 kg of waste per day, how much waste is produced in a week?
Q. A city has a population of 200,000 and produces 1.5 kg of waste per person per day. How much waste does the city produce in a week?
Q. A conservation area is home to 300 species of plants. If 20% of these species are endangered, how many endangered species are there?
Q. A conservation program aims to increase the population of an endangered species from 300 to 600 in 5 years. What is the required annual growth rate?
Q. A conservation program aims to increase the population of an endangered species by 25% each year. If the current population is 400, what will be the population after 2 years?
Q. A conservation program costs $200,000 to implement and is expected to save 500 endangered species. What is the cost per species saved?
Q. A factory reduces its waste by 20% each year. If it starts with 5000 kg of waste, how much waste will it produce after 2 years?
Q. A factory reduces its water usage by 15% from 2000 liters per day. What is the new water usage?
Q. A factory reduces its water usage by 20% from 5000 liters per day. What is the new daily water usage?
Q. A factory reduces its water usage by 20% from 5000 liters. How much water does it use after the reduction?
Q. A household uses 150 liters of water per day. How much water will it use in a month (30 days)?
Q. A household uses 200 kWh of electricity per month. How much electricity will it use in a year?
Q. A lake ecosystem has a fish population that doubles every year. If there are 50 fish in the first year, how many will there be after 4 years?
Q. A lake ecosystem has a fish population that doubles every year. If there are initially 50 fish, how many fish will there be after 4 years?
Q. A landfill site can hold 1 million tons of waste. If it receives 20000 tons of waste per week, how many weeks will it take to fill the site?
Q. A landfill site can hold 5000 tons of waste. If it receives 200 tons of waste per day, how many days will it take to fill the site?
Q. A researcher finds that a certain plant species grows at a rate of 5 cm per month. How tall will the plant be after 2 years?
Q. A researcher finds that a certain plant species has a growth rate of 5 cm per month. How tall will the plant be after 2 years if it starts at 10 cm?