Rose has made this scale drawing of her house. How wide is her house?
A- 23.5 ft
B- 40 ft
C- 54.5 ft
D- 70 ft

D) 70 ft

Step-by-step explanation:

1 inch = 20 feet

3 1/2 inches= 20 feet*3 1/2 inches

= 70 ft

960 ft^2

Step-by-step explanation:

There are 9 surfaces forming the solid.

5 of them are congruent squares and 4 of them are congruent triangles.

area of square = (side)^2

area of triangle = (base)(height)/2

total surface area = 5 * area of square + 4 * area of triangle

A = 5 * (12 ft)^2 + 4 * (12 ft * 10 ft)/2

A = 5 * 144 ft^2 + 4 * 60 ft^2

A = 720 ft^2 + 240 ft^2

A = 960 ft^2