A solid copper sphere of radius 30cm is melted down and completely recast into a
copper wire of diameter 1mm. Calculate the
length of wire formed, giving your answer in
km. (3mks)​

answer: haha (: i’ll go see what it is

step-by-step explanation:

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

why are you giving so many marks make your marks less and make a question list so that i can understand your question very nicely