We have that
[the area of the trapezoid]=[area of rectangle]+2*[area of triangle]
[the area of the trapezoid]=[10*9]+2*[9*9/2]
[the area of the trapezoid]=[90]+2*[40.5]= 171 units²
see the attached figure
the answer is 171 units²
Everything is in million acres, so we can just drop that while we work it out but just remember we have to add it back on at the end of the problem.
First year 3.42
Second year 8.71
Third year ???
Total 21.46
So...
3.42 + 8.71 + ? = 21.46
12.13 + ? = 21.46
? = 21.46 - 12.13
? = 9.33
The 3rd year 9.33 million acres were burned
*Note I put a ? for the unknown. I could have used x or y or anything else.
Búscalo en m a t h w a y hay tiene que aparecer
Answer: 97
Step-by-step explanation: The first 25 prime numbers (all the prime numbers less than 100) are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 (sequence) just if you need all the primes