You need to drain on the WASTE position, NOT the BACKWASH position. If you have a swimming pool sand filter and use the BACKWASH position you might end up losing sand in the process of draining. 2. CLOSE the skimmer valve so the filtration system is not pulling in air when the water level gets below the skimm
ength times width gives the surface area of the pool. Multiplying that by the depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, multiply the cubic feet of the pool by 7.5 to arrive at the volume of the pool, expressed in gallons.
Answer:
B
Step-by-step explanation:
Answer:
hb ≈ 7.06cm
Step-by-step explanation:
Using the formulas:
A=hbb
2
A=s(s﹣a)(s﹣b)(s﹣c)
s=a+b+c
2
Solving for <em>hb</em>
hb=﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4
2b=﹣154+2·(15·17)2+2·(15·8)2﹣174+2·(17·8)2﹣84
2·17
≈7.05882cm
Answer:
+1
Step-by-step explanation:
Well (+) and (-) is equals basically to (-) when add ing them or multiplying them... so the difference is +1
Convert degrees to radians, multiply by π/180° , since a full circle is 360 ° 360 or 2π radians.
− 405°⋅ π /180° radians
Cancel the common factor of 45 .
-9 ⋅ π/4 radians
Combine −9 and π/4
-9π/4
Move the negative in front of the fraction.
-9π/4 radians
