...9975)*100%=0.25% 3.let the original yield per unit area be x,the original size of farm be a,the original total yield be y and the new total yield be Y xa=y Y=(1-20%)a乘(1+30%)x =(0.8a)(1.3x) =1.04(ax) Y=1.04y %increase=(1-1.04...
1. false: (150-12) /150 * 100% = 92% 2. true 2000* ( 1 + 0 .2) = 2400 3. false 375 * ( 1 - 0 .4) = 225 4. false X * ( 1 + 0 .15) = 736 ; X = 640 5. true (81 - 72 ) / 72 * 10% = 12.5% 6. true X * ( 1 - 0 .16) = 210; X = 250
...original sphere and the smaller sphere are similar. Original radius : New radius = 1 : ³√( 1 - 0 .2) = 1 : 0 .9283 % decrease in radius = ( 1 - 0 .9283) × 100...
...1000/1.05 + 1000*0.98/1.05² + 1000*0.98²/1.05³ + ... = 1000/1.05 * ( 1 + 0 .98/1.05 + (0.98/1.05)² + ... ) = 1000/1.05 / ( 1 - 0 .98/1.05) = 1000/(1.05 - 0.98...
分類：教育及參考書 > 高等教育 (大學或以上) 2014年10月30日
The new weight of Chris: 72*( 1 - 0 .2) = 57.6 kg The upper limit of... new weight: 57.6 - 4 = 53.6 kg If this is Anna's new weight, the % decrease in Anna's weight: [(66 - 53.6)/66]*100% = 18...
...1)=(a+b)+2=11/4+2=19/4 and the new product of roots =(a+1)(b+1)=(ab)+(a+b)+1=(-5/4)=(11/4)+1=10/4 so the new equation is x^2-19/4x+10/4// 3) Find the real roots of each of the following equations...
...download a software 'WINRAR' to unzip the file or u can use the newest version of 'WINZIP' those r 2 most popular unzip softwares...
... of the roots og the quadratic equation x^2 -4x + 1 = 0 . sum of root of new equation = a^2 + b^2 = (a+b)^2-2ab = 14 product of root of new equation = a^2b^2 = 1...
...6667 (4 decimal place) Question 2. Let x be new number of members in the club. (x – 4) = original... of marbles in bag B The new number of marbles in bag A = ...
... A + B = 7/2 Product of roots AB = 1/2 New sum of roots (-1/A) + (-/B) = -(A + B)/AB...
