Answer:
21 m
Step-by-step explanation:
The motion of the frog is a uniform motion (constant speed), therefore we can find the distance travelled by using
![d=vt](https://img.qammunity.org/2020/formulas/physics/middle-school/u8icp35v1hbarmduh3luj1ggc5xhmglpnp.png)
where
d is the distance covered
v is the speed
t is the time
The frog in this problem has a speed of
v = 2.1 m/s
and therefore, after t = 10 s, the distance it covered is
![d=(2.1)(10)=21 m](https://img.qammunity.org/2020/formulas/physics/middle-school/fbvt6pr06j57pcx53dtryhbkk2hybuc7l6.png)