Answer:
144 sq in
Step-by-step explanation:
Face height=9, bases=6 in
#Assume the pyramid has a square base.
First we need to calculate the perpendicular height of the pyramid:

Now to find the surface area of each pyramid:

Hence amount of construction paper needed to make each pyramid is 144 sq in
Answer:
the batteries and the newspaper
Step-by-step explanation:
its the batteries and the newspaper because he didn't intend to get that when he went to the store. It was an impulse. Note the impulse purchase.
11) 7 + -10+(4(5+-3)) = 7+-10+8=5
12) (12 +-10)+3x+-1(2x+4x), 12+-10x+3x+-2x+-4x = 12+-13x
Just solve the equation, x + 0.15x + 0.06x = 15
1.21x = 15,
x = $12.39 (nearly)