作业帮5,6,7,8,9,10题,
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5,6,7,8,9,10题,
5,6,7,8,9,10题,
5,6,7,8,9,10题,
5(a) volume of cylinder=(pai)(10)square(21) =2100pai
volume of ice-cream= 4/3(pai)(2.1)cube =12.348 pai
2100pai/12.348 pai =170 scoops of ice cream
(b) 170 x 86 =14620 (i don't know what currency is that)
6(a) radius of choc =7.5/2 =3.75
volume of choc= 4/3(pai)(3.75)cube =70.3125pai / 220.89
(b) volume of box=7.5 x 7.5 x 7.5 =421.875
amount of space = 421.875 - 220.89
= 200.985
7(a) volume of balloon=4/3(pai)(0.25)cube =0.06544(metre cube)
(b) 0.06544 x 7.02 = $0.459/$0.46
8 volume of ball with radius of 10cm =4/3(pai)(10)cube
=4188.79
volume of ball with radius of 7.5cm = 4/3(pai)(7.5)cube
=1767.15
how much rubber can save= 4188.79 - 1767.15
= 2421.64
9 volume of sphere with radius of 5 = 4/3(pai)(5)cube
=523.6
volume of sphere with radius of 6.5 =4/3(pai)(6.5)cube
=1150.35
1150.35-523.6 =626.75 ,the student needs 626.75 cmcube of clay
10 volume of ball= 4/3(pai)(11.14)cube
= 5790.87
volume of box = 22.28 x 22.28 x 22.28
=11059.76
volume of space =11059.76 - 5790.87
= 5268.89
percentage of space =5268.89/11059.76 x 100
= 47.64%
That's the end of the solution,pls be notice that my pai is not 22/7 or 3.142 ,i juz press straight fr the calculator.anyway,hope you can understand my solution!