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Thus ;

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<span>The coefficient for x^7*y is equal to 8Choose7 which is 8!/7! which is 8, or answer b. Pascal's triangle may be used to capture this as well, or use the exponent as above.</span>
Answer:
810 mL of hardener
Step-by-step explanation:
You need 45 mL of hardener for each container and you have 18 containers so:
45 x 18 = 810 mL
M∠BDC=half the arc it faces=1/2 of 54=27
BD is the diameter, so m∠C=90
m∠DBC=180-90-27=63