The volumes of two similar solids are 210 m3 and 1,680 m3. the surface area of the larger solid is 856 m2.
what is the surface area of the smaller solid?

         The surface area of smaller solid is:

                                  214 m²

Let A,V be the surface area and the volume of larger solid.

and A',V' be the surface area and volume of other solid.

We know that the ratio of volume to the surface area of the solid is given by:

On taking power 6 on both side we obtain:

We have:

V=210 m³ ,  V'=1680 m³

A=856 m²

Hence, we have:

Hence, the surface area of solid is:

                       214 m²

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!

2

step-by-step explanation: