Atree casts a shadow 9 meters long. at the same time, a building 54 meters tall casts a shadow 21 meters long. to the nearest meter, what is the height of the tree?

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

Who long does it take to drive 150 miles at 45 miles per hour