Question

Can someone please check my work?

Answer 1

The surface area of a cone with radius r units and slant height s units is shown below:

Surface area = 3.14(rs + r2)

Part A: If r = 2 units and s = 3 units, write an expression that can be used to calculate the surface area of the cone.

Part B: What is the surface area of the cone? Show your work.

Answer 2

I created this Expression: 3.14(23+2^2)

Answer 3

and i solved for the answer and got 84.78

Answer 4

@Michele_Laino

Answer 5

@phi

Answer 6

almost. in algebra, rs means r*s (we don't bother to put in the multiply sign... we assume it is there)
but when you put in numbers, you have to put in the multiply sign because 2*3 is different from 23

Answer 7

i thought that at first but i thought i was wrong

Answer 8

3.14(2*3+2^2)

Answer 9

yes, much better

Answer 10

ok now ill have to do my calculation again one sec ok

Answer 11

So now the answer is 31.4 correct?

Answer 12

yes

Answer 13

Thank you @phi (: