(A) 20 yd^2
(B) 30 yd^2
(C) 36 yd^2
(D) 40 yd^2

20yd^2

Step-by-step explanation:

if you cut the shape in the x axis you have a triangle and rhombus

if you find the area of each and add

Area of  rhombus is diaginal times diaganol over 2

(4x5/2) = 20/2 = 10yds

area od a triangle is base times hight times 1/2

(5x4x1/2) 20x1/2 = 10yd

10 + 10 = 20 yards

10 you would take 50/ .2

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.