in the central city grand prix out of 30 cars that started the race,12 of them finished. what percent of the cars finished the race? what percent did not finished the race?
Answers
Answer 1
Answer:
To get the answer we can use proportion. 30 ------------- 100% 12 --------------x crossmultiply now 30x=12*100% 30x=1200% /:30 (divide both sides by 30) x=40% - its the percentage of cars which finished the race. 100%-40%=60% - its the answer
Answer 2
Answer:
Subtract 12 from 30 so that you know how many DID NOT finish. 30-12=18. 12/30 finished. Divide 12 by 30. 12÷30=0.4, and multiply by 100%. 0.4x100=40, so 40% finished.
18/30 did not finish. Divide 18 by 30. 18÷30=0.6, and multiply by 100%. 0.6x100=60, so 60% did not finish.
Length 5 units,Width 3 units p=2(L+W) p=2(5+3) p=10+6 p=16 units
My assignment says The perimeter of a rectangle is 30 cm.Find the whole-number dimensions of the rectangle with: a) the greatest area b) the least area can someone explain?
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Let side be "a" cm. So another side is (30-2a)/2=15-a S=ab=a(15-a)=15a-a^2 - parabola maximum when a = -15/-2=7.5 cm When a=7.5 all sides are 7.5 cm So it's a square. S=a*a=7.5*7.5=56.25 cm^2 - max There is no global minimun for S.(look at the graphic)
If p varies directly with q, and p = 8 when q = 2, what is the value of p when q = 7? A. p = 40 B. p = 28 C. p = 1 D. p = 100
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the answet is B. p = 28
Write 0.000038 in scientific notation.
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0.000038 = 3.8e-5 = 3.8×10⁻⁵
0.000038 => 10^-5 * 38
For what values of b will F(x) = logbx be an increasing function?O A. b>1 O B. b<1 O c. b< 0 O D. b>0
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A is the only way to go and I have to tell you that this is what the answer is