Answer:
surface are: 300 cm2
volume: 450cm3
Step-by-step explanation:
Hi, to answer this question we have to apply the next formulas:
Surface area of a box = 2wl + 2hw + 2 lh
Where w is the width of the box, l is the length of the box, and h is the height of the box.
The top sides and bottom have only length and width, since there is no top side, the surface area is equal to the outer 5 surfaces.
S = wl + 2hw + 2 lh
Replacing with the values given:
S = (15x10)+ 2(3x10)+ 2(15x3)
S = 150+60+90=300 cm2
For the volume we simply apply:
Volume of a rectangular prism: length x width x height
V = 15x10x3 = 450cm3
Feel free to ask for more if needed or if you did not understand something.
Answer:70x
Step-by-step explanation: FIND BY OWN
Just plug in b =2 into 7+b
So 7 + 2 = 9
Answer:
Because the product is always non-termination,non-repeating decimal.
Step-by-step explanation:
If we have 
is irrational; 
is rational such that 
, then 
is irrational.
A way to represent this is:
Note that we have a contradiction, because is not a rational number, as I stated in the beginning. Therefore, ab is irrational.
Answer:
<h2>
4.5 cm</h2>
Step-by-step explanation:
L = 2×π×r
9π cm = 2πr
9 cm = 2r
r = 4.5 cm
