i don’t get it help i need to understand it kinda confusing please help me if u don’t i’ll fail

Answer: Brainliest? It's a lot of questions
Step-by-step explanation:
7) 20*50 = 1000
8) 10^2 = 100
20*6=120
120>100
Yes, she will finish the reading in time because she will read 20 pages more than needed.
9) 10 x 20 x 30 x 40 = (1 x 10) x (2 x 10) x (3 x 10) x (4 x 10)
=(1 x 2 x 3 x 4) x (10 x 10 x 10 x 10)= 24 x 10000 = 240000
10) Called different things different places do yourself
11) (10^3 x 12) + (10^2 x 35)
=(1000 x 12) + (100 x 35)
=12000+3500
=15500