# Hi tomorrow is my Math exam i really need help

• Mar 19th 2012, 02:53 AM
tmrismyexam
Hi tomorrow is my Math exam i really need help
Im really poor in math and i think im gono fail my math exam . oh god
Can some one help me with these things that i have no idea what they are please PLEASE They are in my exam review paper
Ex.1: Calculate the total surface area of a conical cup with base radius 7cm an slant height 14 cm
Ex.2: A basketball has a surface area of 1810 cm square . find the radius of the basketball and find the volume of the air in it
Sorry if i posted in wrong place
• Mar 19th 2012, 03:07 AM
princeps
Re: Hi tomorrow is my Math exam i really need help
Quote:

Originally Posted by tmrismyexam
Im really poor in math and i think im gono fail my math exam . oh god
Can some one help me with these things that i have no idea what they are please PLEASE They are in my exam review paper
Ex.1: Calculate the total surface area of a conical cup with base radius 7cm an slant height 14 cm
Ex.2: A basketball has a surface area of 1810 cm square . find the radius of the basketball and find the volume of the air in it
Sorry if i posted in wrong place

1#

$\displaystyle A=r\pi(r+s)$

2#

$\displaystyle A=4r^2 \pi \Rightarrow r=\sqrt {\frac{A}{4\pi}}$

$\displaystyle V=\frac{4}{3} r^3 \pi$