Answer: C. 4.86
Explanation:
Given : The two rectangles below have the same height-to-width ratio.
Since , width of blue rectangle = 34 units
Height of blue rectangle = 21 units
and width of red rectangle = w units
Height of red rectangle = 3 units
Then,
![\frac{\text{Height }}{\text{Width}}=(21)/(34)=(3)/(w)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/12op5pidpmrpns0xiuiz0jewjp8dz697lc.png)
i.e.
![w=(3)/(21)*34=4.85714285714\approx4.86](https://img.qammunity.org/2020/formulas/mathematics/middle-school/gn9uv3lxhj8pp4cujo7nmk41z96pktdo8g.png)
Hence, The value of w= 4.86