The area of the minor sector DFE is gotten as; D: 66.1 square cm
<h3>How to find area of sector?</h3>
Formula for area of sector is;
A = (θ/360) * πr²
We are given;
minor angle; θ = 100°
radius; r = 8.7 cm
Thus;
A = (100/360) * π(8.7²)
A = 66.1 square cm
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You will have 22 grams left because the substance is halved every 2 seconds. After the first two seconds, you would have 44. It is halved again to make 22.
X is always dependant to Y. so that should answer the 1st one. the 2nd looks to be around 17-18. 17.5 maybe. and the 3rd is yes cause he does not go to the pool so it isnt any cost.
I think G=50 because 5 times 10