Answer:
Surface Area = 2×(3.5×10 + 3.5×8 + 10×8) = 286 feet
Explanation:
First, multiply 3.5 by 10 (35)
Secondly, multiply 3.5 by 8 (28)
Then, multiply 10 by 8 (80)
Next, add all the values together (143)
And lastly, multiply 143 by 2 (286)
Please turn this into your own work, (By making it look like it's worked out) since they can catch you for Plagiarism.