Number 4: Can you please help me? I am in middle school and I need some help! Thanks!

Hello from MrBillDoesMath!
Answer:
253
Discussion:
Area of a trapezoid = (1/2) ( b1 + b2) h
where b1,b2 are the bases; h is the altitude. In our case this becomes
Area = (1/2) (18 + 28) 11
= (1/2) (46) 11 =>
= 23 * 11 =>
= 253
Thank you,
MrB