In a newspaper, it was reported that the number of yearly robberies in Springfield in 2010 was 164, and then went down by 50% in 2011. How many robberies were there in Springfield in 2011?

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.