Answer:
in order to determine the sign, we need to solve it first
lets collect the like terms by one side
x=41+2
x=43
so, the sign is positive
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Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Using the rules of exponents
• ×
⇔
• ⇔
Hence
=
=
, then
=
=
→ C
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
