35 !
what is the simplest form of the expression?
d. none of these

.

In order to solve this problem we have to reduce the expression.

First, we have to combine the expression in a single radical:

Second, we have to reduce the expression above  by elimination of common factors:

rewriting the expression above:

Simplifying:

Multipliying the resultant expression by

Resulting:

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google