Answer:
oouu I'm in 7th grade science and I already did this I can help!
Its a type of thermal expansion and described by fractions that represents the fractional increase length of a thin beam of a material exposed to its temperature increase of one degree celcious,"
3/4, 0.075, 0.75%. Best of luck!
<u><em>Answer is in bold</em></u>
Harry can first substitute 30 for t. He can then multiply 
by 30 to get a product of 10. Since 15 is equal to 30 × 1/2, Harry's solution is not correct.
Hope this helps :)
Have a great day!
