What is the approximate surface area of the cone shown (use 3.14 for π.) with d 40in and height of 40in

4064.5

Step-by-step explanation:

The formula for surface area of a cone is

r= radius

h= height

=3.14 (in this instance)

*remember that radius =1/2 of a diameter AKA d

So our radius is:

r=20

our height is:

h=40

and is:

3.14

Lets use our formula now

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

if you was gonna solve for a, a is a   < -12