To find the total area of the national park and the national forest combined, you add their areas together:
1.42 × 10^6 acres (National Park)
- 1.2 × 10^6 acres (National Forest)
= (1.42 + 1.2) × 10^6 acres
= 2.62 × 10^6 acres
So, the total number of acres in the park and the forest combined is 2.62 × 10^6 acres.