Answer:
Hey buddy,
Step-by-step explanation:
2 multiplied by 3 is equal to 6 And 3 groups of 2 is 6. Instead of adding everytime multiplication is much easier .
Notice that the two semicircles have a radius of 10/2=5 and that their area is simply the area of a complete circle with a radius of 5. In the center you have a rectangle that is 10 by 8. So the total area is:
A=pr^2+xy
A=25p+80 m^2
A≈158.53 which is:
A≈158.5 m^2 (to the nearest tenth of a m^2)
Answer:
The total surface are is 252 sq. units.
Step-by-step explanation:
The right triangular sides have legs 8 units and 6 units and hypotenuse 10 units.
So, their area will be 
sq. units.
Now, the length of the prism is 8.5 units.
So, the area along the length will be = (8.5 × 6 + 8.5 × 8 + 8.5 × 10) = 204 sq. units.
Therefore, the total surface area is (48 + 204) = 252 sq. units. (Answer)
C. Multiply and add
Cost = (3×21.99)+45.99
Cost = $111.96
Total units= 1+3+6
=10
10 units= $40
1unit= $40/10
= $4
Person 1= $4 x 1
= $4
Person 2= $4 x 3
= $12
Person 3=$4 x 6
=$24
