Answer
$79.45
Use the <em>simple interest formula</em>
A= P(1+rt)
A = 70(1+0.045×3)
And you solve, which gives you 79.45
325 meters in 28 seconds is 11.6 meters per second hope this helps.
1 trillion is 10^9.
Thus, 21 1/2 trillion is 21 1/2 times 10^9, or 2.15 times 10^10
Hope this helps. If not, ask for clarification.
Your answer is (a) because 4 times 2 is 8 but since it's negative 2 it's negative 8
