Question

Our Singapore Zoo first opened in 1973 with a modest collection of 250 animals from some 7 species. Currently it has 2 800 animals from some 300 species.

(a) 26 % of the current 300 species in the zoo are threatened to extinction. Calculate the number of threatened species.
A) 78 species
B) 65 species
C) 78.3 species
D) 260 species

(b) An estimate of 500 animals will be born or hatched at our Singapore Zoo in the coming year. Calculate the percentage increase in the animals in the coming year, assuming no deaths.
A) 17.86%
B) 12.5%
C) 15%
D) 10%

Answer 1

The number of threatened species in the Singapore Zoo is 78 species, and the percentage increase in the number of animals in the coming year is approximately 17.86%.

Step-by-step explanation:

To calculate the number of threatened species in the Singapore Zoo, we can use the given information that 26% of the current 300 species are threatened. First, we find the number of threatened species by multiplying 26% by 300, which gives us 78 species. Therefore, the answer to part (a) is A) 78 species.

To calculate the percentage increase in animals in the coming year, we can use the estimate of 500 animals. The percentage increase is calculated by dividing the number of new animals (500) by the current number of animals (2800), then multiplying by 100. This gives us a percentage increase of approximately 17.86%. Therefore, the answer to part (b) is A) 17.86%.