# How do you evaluate #b=sqrt(a^2-c^2)# given a=29 and c=20?

##### 2 Answers

Nov 24, 2016

#### Answer:

#### Explanation:

You substitute

Nov 24, 2016

#### Answer:

#### Explanation:

To evaluate b, substitute the values given for a and c into the radical.

#rArrb=sqrt(29^2-20^2)#

#=sqrt(841-400)=sqrt441=21#