The measure of the interior angle at vertex C is D. 144.
<h3>How to calculate the angle?</h3>
Based on the information given, the angle will be calculated thus:
8x + 8x + 8x + 3x + 3x = (5 - 2) × 180
30x = 540
Divide both side by 30
30x/30 = 540/30
x = 18
Therefore, at vertex C, we have 8x. This will be:
= 8x
= 8 × 18
= 144
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70/7= 10 miles in January
10/4 = 2.5 miles in February
It is equal to 825 sticks total
Work in fractions of the pool the pumps can drain per hour:-
1/6 + 1/4 = 1/x where x is the time to drain the pool by the 2 pumps together
4x + 6x = 24
10x = 24
x = 2.4 hours <===== answer