Answer:
Did you mean to ask how many holes can the drill drill in 25 minutes, then the answer is 50
Answer:
the correct answer is -3.125
Step-by-step explanation:
A. The discriminant is 81. The formula is b^2 - 4ac.
B. 2 answer and both will be rational due to the fact that the discriminant is a perfect square.
C. Solutions are 1/2 and -4. You can find using the quadratic formula.
The first working out is correct, z = 3
189.9 miles= 305.614
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