First round 6254 to 6000 then multiply it by 2.
6,254=6,000x2=12,000
If you need help on the multiplying bit here is how you do it:
First take the whole numbers so 6 and 2. Next multiply them. 6x2=12. Then all you do is add the zeros. So in this case there are three zeros so 12,000 is your estimated answer.
Answer:
15
Step-by-step explanation:
5kg= £7.50
10kg= £7.50(2)
£7.50 times 2 equals 15
£15
Answer:
4 + 9i
Step-by-step explanation:
A complex number consists of a real part and an imaginary part, that is
z = x + yi ( x is the real part and yi the imaginary part )
A complex number does not exist in the set of real numbers.
Answer:
Step-by-step explanation:
<u>Surface area:</u>
- S = 2(lw + lh + wh) + 2πrh
- S = 2(9*4 + 9*5 + 4*5) + 2*3.14*2*3 = 239.7 cm² (rounded)
<u>Volume:</u>
- V = lwh + πr²h
- V = 9*4*5 + 3.14*2²*3 = 217.7 cm³ (rounded)
Step-by-step explanation:
No. Jack's solution doesn't make sense.
It is given that, 8.5 - a = 5
Jack is saying that addition and subtraction are reverse operations. Yes, it's true, but here,
8.5 - a = 5
If we move 5 to the opposite side, it becomes -5, and -a to the other side, it becomes a.
So, 8.5 - 5 = 3.5 and not 13.5.
Overall, Jack's solution doesn't make sense.