If the ratio of the corresponding sides of similar polygons (or the
radii of similar circles) is m:n,
then the ratio of their areas is
m
2
:n
2
. If the radius of a sphere is
multiplied by a factor of 4 to
create a larger sphere, what is the
ratio of the surface areas of the
two spheres?

sorry, can't i suggest going to algebra.com

step-by-step explanation:

the answer is here: : )

:

22

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!