Answer:
the answer is 445.5
Step-by-step explanation:
what I did was divide 50 by 495 and got 9.9 then since it took 45 minutes every 50 square feet of floor i multiplied 45 x 9.9 and got 445.5
keeping in mind that a year has 12 months, thus 6 months is really 6/12 of a year.

Answer:
1st is correct
Step-by-step explanation:
Like charges repel each other.
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Y=2x+6
gradient is found from the formula,

y intercept is found by subbing the values of (-1,4) into the equation y=2x+c
Answer:
140
Step-by-step explanation:
B=35
1/3 (35)(12)
= 140