Answer:
2 grams
Step-by-step explanation:
50 years is 5 half lives as 1 half life is 10 years.
64 divide 2 = 32-1 half life
32 divide 2 =16-2nd half life
16 divide 2 = 8-3rd half life
8 divide 2 = 4-4th half life
4 divide 2 = 2-5th half life
This means we will have 2 grams left of the radioactive substance after 50 years.
Answer:
Step-by-step explanation:
I am pretty sure it’s 4/9 * 6/5 = x
( I think it’s this )
Step-by-step explanation:
well, I see one large rectangle (20×6), and 2 small triangles with their horizontal sides being (20-8-6)/2 = 3 m. and their vertical joined side being 10-6 = 4 m.
the total area is simply the sum of the rectangle and the 2 triangles.
the rectangle is
20×6 = 120 m²
each triangle is
4×3/2 = 2×3 = 6 m²
we have 2 of them, so their combined area is 2×6 = 12 m².
the total area is
120 + 12 = 132 m²
A=R, B=S, C=P, and D=Q
hope this helps!
Answer:
3* (36 - 5x)
Step-by-step explanation:
The total area of the flower garden is equal to the surface of the rectangle that encloses the flowers border and the sitting area minus the area of the sitting area.
Rectangle area
Three flower segments height ---- 9 feet
4 flower segments length ----------- 12 feet
Rectangle area = 12*9 ft^2 = 108 ft^2
Sitting area
Sitting area = 3x*5 = 15x
Area of the flower border (A_flwb)
A_flwb = 108 ft^2 - 15x = 3* (36 - 5x)
