NEED HELP ON THIS ONE MY LAST QUESTON I HAVE 10 MINS

Answer:
10
Step-by-step explanation:
Formula:
[tex]\frac{a+b}{2}*h\\\frac{3.4+b}{2}*6.7=44.89\\3.4+b=13.4\\b=10[/tex]
Answer:
b = 10
Step-by-step explanation:
[tex]A=\frac{a+b}{2}h[/tex]
[tex]44.89=\frac{3.4+b}{2} 6.7[/tex]
[tex]6.7=\frac{3.7+b}{2}[/tex] divided both sides by 6.7
[tex]13.4=3.7+b[/tex] multiplied both sides by 2
b = 10