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请问sains要怎样拿A呢？有什么技巧吗？
Please i can't solve calculus
how do i book the tutor's time ?
Any tutor?
YES. im here to help
why teacher hui wen always did not reply want
What is your question?
why teacher hui wen always did not reply want
why i can attend back Lesson 1: 28 Jul 2018 12:00 - 13:00 ? Is it I not really pay so I can't watch back?
Sorry, maybe that is technical problem. you can try it next week. i try my best to get you joining my class
I can't turn on UPSR chinese for today , so how?
i am sorry , maybe that is technical problem. i will try my best to get you joining our next lesson.
A large metal ball with a radius of 15 cm is melted down to make smaller metal balls with a radius of 5 cm. How many of these smaller metal balls can be made?
Volume of a large metal ball with R = 15 cm is equal to volume of x metal ball with r = 5 cm
So,
4/3 (π)(R^3) = 4/3 (π)(r^3)(x)
x = (R^3) / (r^3)
= (15^3) / (5^3)
= (15/5)^3
= 3^3
= 27
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