Answer:
5
Step-by-step explanation:
see attachment below
The area of the 3d figure
the area of the one of triangle is 8.7
and the reactangle is 5 x 7 = 35
and the big one is 10 x 7 = 70
so 8.7 + 8.7 + 35 + 35 + 70 = 157.4
log (4x-1) + 5 = 8
log (4x-1) = 8 - 5
log (4x-1) = 3
4x - 1 = 10³
4x - 1 = 1000
4x = 1001
x = 1001/4
ok done. Thank to me :>
