the first time you hear a sound it took 2.6seconds and takes 7.1 seconds for you to hear an echo the speed of sound is 340m. s how wide is the river

i think its c if i'm wrong

god i hope this !

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.