Question

Help please! Gave photo to be done :)

Answer 1

`\displaystyle\\Answer:\ M=(4\pi ^2a^3)/(GT^2) \\`

Explanation:

`\displaystyle\\T^2=(4\pi ^2a^3)/(GM) \\`

Multiply both parts of the equation by M:

`\displaystyle\\MT^2=(4\pi ^2a^3)/(G) \\`

Divide both parts of the equation by T²:

`\displaystyle\\M=(4\pi ^2a^3)/(GT^2) \\`