A farmer wants to measure the distance across a river on his farm. One morning, he notices that the shadow of a tree on one bank falls directly across the river so that the tip of the shadow just touches the opposite
bank. At the same instant, he measures the length of the shadow to a nearby fence post and finds it to be
3.75 m. He knows the tree is 12 m tall and the post is 2 m tall How wide is the river?

b. 24 mm

step-by-step explanation:

use the pythagorean theorem.

a^2 + b^2 = c^2

a^2 + 7^2 = 25^2

a^2 + 49 = 625

a^2 = 576

a = 24

answer: b. 24 mm

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

step-by-step explanation: