# Few C3 QsWatch

#1
firstly, just wondering if i've got this right:

The surface area of a sphere is increasing at the rate of Find the rate of increase of the radius of the sphere when the radius is 5cm.

at

2) i) Use Simpson's Rule with 5 ordinates to find the value of

Using x at 0, 0.5, 1.0, 1.5, 2 (4 strips).. i used the rule to find
yo + 4y1 + 2y2 + 4y3 + y4 = 6.2022... then multiplied this by (0.5/3) = 1.0337 units squared. Anywhere i can check this is right quickly?

ii) Hence find
what do i do with answer in i) to get this

thanks
0
10 years ago
#2
(Original post by Salinger)
firstly, just wondering if i've got this right:

The surface area of a sphere is increasing at the rate of Find the rate of increase of the radius of the sphere when the radius is 5cm.

at

2) i) Use Simpson's Rule with 5 ordinates to find the value of

Using x at 0, 0.5, 1.0, 1.5, 2 (4 strips).. i used the rule to find
yo + 4y1 + 2y2 + 4y3 + y4 = 6.2022... then multiplied this by (0.5/3) = 1.0337 units squared. Anywhere i can check this is right quickly?

ii) Hence find
what do i do with answer in i) to get this

thanks
Question 1) Your should not have jumped to the top!

ii)
0
#3
(Original post by Mr M)
Question 1) Your should not have jumped to the top!

ii)
Oops, i did have it as , just did latex wrong is that correct now?

and ii) will therefore be

thanks
0
10 years ago
#4
(Original post by Salinger)
Oops, i did have it as , just did latex wrong is that correct now?

and ii) will therefore be

thanks
Both sound good to me.
0
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