Answer:
2a) the # of terms are 11
2b) the term with x^3 is 262440x^3
Step-by-step explanation:
(x+3)^10 expansion: x^10+30x^9+405x^8+3240x^7+17010x^6+61236x^5+153090x^4+262440x^3+295245x^2+196830x+59049
