Alex wants to find out how many ducks there are in a park.
one day he puts a tag on each of 30 of the ducks.
the next day he catches 40 ducks.
8 of these ducks have tags on them.
work out an estimate for the number of ducks in the park.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy