Question

Please some help me fast

Answer 1

Answer:

A

Step-by-step explanation:

To find the best equation, we simply substitute the values of a, b, and c into the given equations.

a = 21

b = 5

c = 36

$a=\dfrac{7}{10}b\sqrt{c}$

$21=\dfrac{7}{10}5\sqrt{36}$

$21=\dfrac{7}{10}5(6)$

$21=\dfrac{7}{10}30$

$21=(0.7)30$

$21=21$