Answer:

Step-by-step explanation:
we know that
To find the area of the backyard that is not covered by the hot tub and fire pit subtract the area of the hot tub and the area of the fire pit from the total area of the square backyard
so

39/78 = .5 = 50%
...................
8/15 = 56/105
This may be solved using proportion.
a/b = c/d
ad = bc where cross products are equal.
a = 8
b = f
c = 56
d = 105
ad = bc
8*105 = f*56
840 = 56f
840/56 = 56f/56
f = 15
56 ÷ 7 = 8
105 ÷ 7 = 15
Answer:
0.000000001
Step-by-step explanation:
Let's convert this :
0.000000001
tHT M B
t=tenths
H=Hundredths
T=Thousandths
M=millionths
B=Billionths