Answer: 80 square units
Step-by-step explanation:

421 because 9% of 290 is 26.1 so you multiply that by 5 and add 290 and you get 420.5 so you get 421 rounded to the nearest whole number
123.875 i think is the answer
Two digit prime number:29
one less than a multiple of 10: 10*3-1=29
If you add 30 to me, you get another prime number. 29+30=59
who am I? 29