Question: 10 A simple universe has matter density parameter m0 = 1, and other density parameters 0 = k0 = r0 = 0. Using the Friedmann

10 A simple universe has matter density parameter m0 = 1, and other density parameters 0 = k0 = r0 = 0.

Using the Friedmann equation, find equations for

1. comoving radial distance, r(a);

2. time before present, t(a).

Sketch these functions.

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