Can someone check my answers pleaseee

Question

Can someone check my answers pleaseee<3

epoweritheta · Answer

hi country beautiful ,what help ?

anonymous · Answer

1.   Use Euler’s Formula to find the missing number.
Vertices: 15
Edges: 24
Faces:    ?
9
10
11<-
12
2.   Describe the cross section.
pentagon<-
trapezoid
hexagon
cube

3.   A jewelry store buys small boxes in which to wrap items that they sell. The diagram below shows one of the boxes. Find the lateral area and the surface area of the box to the nearest whole number. Use the large 15 x 6 cm rectangles on the top and bottom as the bases.
47 cm2; 275 cm2
95 cm2; 365 cm2
47 cm2; 365 cm2
95cm2; 275cm2<-

epoweritheta · Answer

eulers formula is :
# faces-# edges+#vertices=1
easy way to remember is 
# 2D - #1D + #0D=1

epoweritheta · Answer

to describe the cross scetion search about those figures on the internet

epoweritheta · Answer

where is the figure for the 3 rd q ?

anonymous · Answer

so #1 is right, right? @epoweritheta

epoweritheta · Answer

i think 10 is the answer for #1

anonymous · Answer

oh yes never mind you are right I just did the problem again and got 10