The ratio of surface areas of two similar solids is equal to the square root of the ratio between their corresponding edge lengths. true or false

False.

Step-by-step explanation:

Let us consider two similar cuboids A and B as shown in the figure below.

We have that,

'A' has length, width and height 5, 3 and 4 units respectively.

'B' has length, width and height 7.5, 4.5 and 6 units respectively.

Also, surface area of a cuboid = 2 × ( L + W + H ), where L= length, W= width and H= height.

Now, we will find the surface area of A and B.

Surface area of A, = 2 × ( 5 + 3 + 4 ) = 2 × 12 = 24

Surface area of B, = 2 × ( 7.5 + 4.5 + 6 ) = 2 × 18 = 36

Therefore, the ratio of the surface area is : = 24 : 36 = 2 : 3.

Moreover, the ratio of square root of lengths is given by = 2.24 : 2.74

Hence, we see that the ratio of the surface area of two similar solids is not equal to the square root of the ratio between their corresponding edge lengths.

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!