I really need help on this question! I had to take two photos since it wouldn’t fit. Please help me on this!

A - gamma-ray telescopes

Explanation:

Gamma rays have the shortest wavelengths of the electromagnetic spectrum, and are blocked by Earth's atmosphere. Therefore, gamma ray telescopes will be used to observe them. Hope this helps :)

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr