Answer:
Step-by-step explanation:
The general formula for the lateral surface area of a regular pyramid is:

Where:
p=perimeter of a base
l=slant height
a.
a=3ft
l=4ft
p=5*a=5*3=15ft

b.
a=2.5ft
l=4ft
p=6*a=6*2.5=15ft

c.
a=1.9ft
l=4ft
p=8*a=8*1.9=15.2ft

d.
Based on a lateral surface area the blue umbrella is best choice. But, the best umbrella overall is the one with the greatest base area. General formula for regular polygon is:

For pentagon:
A=15.48ft^2
For hexagon:
A=16.24ft^2
For octagon:
A=17.43ft^2
Blue umbrella is still best choice.
Answer:
30 minutes
Step-by-step explanation:
if she earns 10 minutes per hour and there are 3 hours, 10 times 3 is 30
Sales price 5
Rate 100/250
Cost to make
5×(100/250)=2 each
64 will be your answer because the amount of blue each time time used for each cupcake will be multiplied into 3 which will be 3