A sphere has a radius of 6 inches and a surface area of 144rt in The radius of the sphere will be doubled
How will this effect the surface area of the sphere?
It will be tripled
It will be doubled.
It will be the same.
It will be quadrupled

It will be quadrupled

Step-by-step explanation:

we know that

All spheres are similar

so

The ratio of the surface areas of two spheres is equal to the scale factor squared

Let

z ----> the scale factor

x ----> surface area of the sphere with radius doubled

y ----> surface area of the original sphere

so

The scale factor is 2 (because the radius of the sphere will be doubled)

substitute

so

The new surface area is 4 times the original surface area

therefore

The surface area will be quadrupled

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies