4*(10*12/2)+4*(12*9)+(12*12)= 816 ft^2
the surface area is 816 ft^2.
The answer is 90, there is 10 millimeters in 1 centimeter! So, if there is 9 centimeters, there will then be 90 millimeters!
Ps: I had my question up but someone reported it since I added a picture that would help you! :(
Hope this does help though! You can always do the jumping trick with meters! That's how I learned :)
Answer:
1.) 25
2.)81
3.)49
Step-by-step explanation:
(I recommend getting a Texas instruments TI-84 you can just plug in the numbers and it does it for you :)
