Answer:
B) 7^2 x 7^3
Step-by-step explanation:
B is 7^5 , everything else is 7^4
1. 1035 words
2. 21.74 min
1. 23 words per min × 45min = 1035 words
2. 500 words/ 23 words per min= 21.74 min
5
