(2r+s)14r=

A-28rs
B-15p^4t
C-15p^4t^2
D-8p^2t
e-8p^4t^2

c

How do r and s change to p and t?

To find the value of the expression (2r + s)14r, we can follow these steps:

1. Distribute the 14r to both terms inside the parentheses:
(2r + s) * 14r = 2r * 14r + s * 14r

2. Multiply the coefficients:
2 * 14 = 28.

3. Multiply the variables with the same base, r:
r * r = r^2.

4. Put the coefficients and result of step 3 together:
28r^2 + 14rs.

Therefore, the answer is 28r^2 + 14rs. None of the given options match exactly with this answer. However, option C (15p^4t^2) is the closest one.