Answer:


Step-by-step explanation:
<em>The question is mixed up with details of another question. See comment for original question</em>
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<u>Given</u>




Solving (a): Solve for time
We have:

Cross multiply

Make t the subject

Solving (b): Solve for distance
We have:

Cross multiply


$63.09
She would have this amount
You take y down 5 then add x
You multiply the exponent
Remember to MULTIPLY exponents (not add them) when you are raising a power to a power. In this case, (−3x3y2)4 = (−3)4(x3)4(y2)4 = −34 · x3·4 · y2·4.
A D and b.............................................