25 POINTS!!!!!
2 answers:
Answer:
∠8 measures 88 degrees.
Step-by-step explanation:
Given the two parallel lines cut by transversal.
Angles 1 to 8 are labelled in diagram as shown in attachment.
∠7 measures 92 degrees.
As n is a straight line therefore
∠7 and ∠8 forms a linear pair.
⇒ ∠7 and ∠8 are supplementary therefore adds up to 180°
∠7+∠8=180°
92°+∠8=180°
∠8=180°-92°=88°
Hence, ∠8 measures 88 degrees.
Option 2 is correct.
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the complete question in the attached figure
Volume of the sand V=(1/3)*h*π*r²
we have that
h=30 mm
r=10 mm
v=(1/3)*30*π*10²=1000≈3140 mm³
the rate is 50 mm³/seg
50 mm³--------------------------------------> 1 seg
3140 mm³-------------------------------- X
x=3140/50=62.8 seg
the answer is 62.8 seg
